BottleNeck SDHC Class - G1 Q&A, Help & Troubleshooting

I have a Class 2 right now. I know, "groan".
But i want to get a HIGHER class.
At what class number on the G1 will I hit the bottleneck of the hardware?
What I'm asking is, is 6 the highest I can go and if I go to 8 it still performs like a 6 due to the slow reader in the phone?
Or can I go up to 8 class, 10 class, etc.
Also, I need someone to confirm that a high-class SDHC (like 8 or 10) even works on this phone, 8 or 16gb kind of thing.
Thanks for your input.
I want to get some o' dem swapz in here.
jcarrz1

I used to think grabbing a higher class card would be better too, i've actually bought a class 6 4gb and a class 4 8gb card, truth is it really don't matter what class you have..
Check this thread it made me see the truth.
http://forum.xda-developers.com/showthread.php?t=1010807

I haven't really looked at class in detail
http://en.wikipedia.org/wiki/Secure_Digital#Speed_Class_Rating
I'm filling in blanks here
it seems that a card will report it's class to the reader and it is then upto the application to decide if it meets it's requirements.
without pulling apart my G1 I have not been able to determine what the controller is to see find it's specs to see if there is a limit to what it can deal with in terms of through put.
I would like to think that the bottle neck is the card, and that a higher class card would be faster
a simple way of looking at it is that even if the G1 doesn't support 10MB/s
a card which does support 10MB/s is more likely to sustain 6MB/s better than a class 6
Sorry I can't provide a real answer here
I would look at the relative cost of class 6/10
if they are not disproportionate then I would go class 10
but if class 10 is 2 or 3 times the price, I would go class 6 (unless I had cash to throw away)
dmesg
Qualcomm MSM SDCC

Thanks for your input, both of you.
Is that script to increase performance that you linked to beneficial in-rom, or just in recovery?
Does that mean that upgrading the class 2 I already have is pointless??

could someone please run a test with the app called "SD Tools" in the market (someone with class 6)
tell me what rom and what speeds you get.
I get 4.3 mb/s write and 18.5 mb/s read. That's with a class 2 8gb on cos-ds WITHOUT SWAP running. <-- idk if that makes a difference.

I think I have a Kingston class 4 (possibly 6, i'm not sure) and my max was around 5.x mb write and 19.x mb read with SD Tools. That was with 2048kb sd cache.

that's not too much better than mine, the stat i posted above was 128, i got about the same as you with 2048.
It seems like you have to make the jump to class 10 in order to get decent speeds on an android phone.
if you take out the sd card and look at it, it will say the class inside a circle directly on the card.

jcarrz1 said:
that's not too much better than mine, the stat i posted above was 128, i got about the same as you with 2048.
It seems like you have to make the jump to class 10 in order to get decent speeds on an android phone.
if you take out the sd card and look at it, it will say the class inside a circle directly on the card.
Click to expand...
Click to collapse
I have a class 4 8gb I will run a bench hear in a second...

i have a 16gb class 10 and it writes @ 5mb/s and reads 17mb/s between a class4 and a class6 but im using apps to ext and swap

I have a MT3G with a 4GB class 2 and i ran SD tool twice and saw a small speed diffrence, the first is with stock 128 cache and second i temporarily set to 1024 cache
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XmeccaX said:
I have a MT3G with a 4GB class 2 and i ran SD tool twice and saw a small speed diffrence, the first is with stock 128 cache and second i temporarily set to 1024 cache
Click to expand...
Click to collapse
run a few times and it will average out
on a few runs I get (approx)
write 6.5
read 18.5
this is a class 6
so
some class hedge bets and they are classX+
regardless of class read is the same
so for swap class matters, but you may get lucky
for apps2sd , it probably doesn't make much difference
BUT this is just one benchmark program, it could be flawed
maybe a simple script with time would be better, but then you have the memory caching etc to consider
still it is interesting so far, certainly the writes seem to fit(ish)

R3N0V4D0 said:
i have a 16gb class 10 and it writes @ 5mb/s and reads 17mb/s between a class4 and a class6 but im using apps to ext and swap
Click to expand...
Click to collapse
could be a hw limit
OR your card was just a re-badged china thing
try without swap running, and the app on internal
that could be getting in the way
the bm app writes to /mnt/sdcard/

Class 6 microSD 8gb, unknown producer (china )
Write speed = 6.5 MB/s
Read speed = 15.2 MB/s
I don't use no modified cache, no swap.
Using 2048kb cache:
Write speed = 6.3 MB/s
Read speed = 18.3 MB/s
Thanks for the cache trick
"SD Speed Increase" app is good to change cache

did i win?

R3N0V4D0 said:
did i win?
Click to expand...
Click to collapse
absolutely, yes. What SD Card???

http://www.amazon.com/gp/offer-listing/B004H8FTCK/

R3N0V4D0 said:
http://www.amazon.com/gp/offer-listing/B004H8FTCK/
Click to expand...
Click to collapse
sweet, thanks

Wrong section!
Sent from my Mytouch 1.2 using XDA Premium App!

Related

What is your SD card benchmark?

I'm wondering if my 8gb class 6 Transcend SD card is slow, or my phone is.
When using J Benchmark I get like 1.4 Megabyte/s write and 2.6 Megabyte/s read.
This is slow for a class 6 card.
Could some of you run J Benchmark and write their results. Please also write which class card you have (and maybe which brand).
Thanks in advance.
I got 1.75 and 2.06 on a Sandisk 16gb class 2.
I have a class 2 16GB Sandisk and I got 2.03mb write & 2.66mb read. Ive been looking to go up to a class 4 or 6 32GB but I'm wondering if my N1 would use the extra speed??
Edit: tested internal NAND and got 0.44mb for write and 2.43mb for read.. is that normal??
100MB File size
8KB Buffer
Write: 3.36 MB/s
Read: 6.99 MB/s
8 Gig Class 6 MicroSD Card
McFroger3 said:
100MB File size
8KB Buffer
Write: 3.36 MB/s
Read: 6.99 MB/s
8 Gig Class 6 MicroSD Card
Click to expand...
Click to collapse
Which brand is that?
OP, heres the qrcode for JBenchmark
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http://www.androidzoom.com/android_applications/tools/j-benchmark-test-for-developer_gqzx.html
For my RiData 16GB Class 6
Data size: 10MB
buffer size: 2KB
Write: 1.66 MB/s
Read: 2.74 MB/s
buffer size: 4KB
Write: 2.25 MB/s
Read: 5.26 MB/s
Sandisk 16gb class 2
I must have a lucky card I have a Polaroid 16gb class 2 from frys for $18 after rebate
10MB, 2k cache
Write: 2.38 | 2.36 | 2.33 -- Avg: 2.36 MB/s
Read: 3.44 | 3.15 | 3.20 -- Avg: 3.26 MB/s
10MB, 4k cache
Write: 4.33 | 4.02 | 4.23 -- Avg: 4.19 MB/s
Read: 6.39 | 5.49 | 6.25 -- Avg: 6.04 MB/s
10MB, 8k cache
Write: 7.62 | 6.60 | 6.99 -- Avg: 7.07 MB/s
Read: 12.42 | 11.22 | 11.10 -- Avg: 11.58 MB/s
I did some more tests with larger files and the speeds are the same.
Thanks for your benchmarks. It seems like my card is very slow for a class 6 card.
I'll probably get another one and hope for better results.
damanrico said:
Thanks for your benchmarks. It seems like my card is very slow for a class 6 card.
I'll probably get another one and hope for better results.
Click to expand...
Click to collapse
I thought I remember reading an article awhile back that many of these cards aren't what they claim to be for class and speed.
How do we really know? It is just a manfucturers claims, what law says they need to prove the actual class and throughput? And if there is a law, who is going to challenge them?
How do you change the buffer size for an SD card - or is this just a feature of whatever benchmark program you use?
gf_gollum said:
How do you change the buffer size for an SD card - or is this just a feature of whatever benchmark program you use?
Click to expand...
Click to collapse
Feature of the benchmark program.
sandisk 8gb class 2 1.68/2.68
If you test at 2kb then it's really slow. The internal nand is even slower. Test at least 4kb to get a better picture or before writing off your sd card
Sent from my Nexus One using XDA App
ChronoReverse said:
If you test at 2kb then it's really slow. The internal nand is even slower. Test at least 4kb to get a better picture or before writing off your sd card
Sent from my Nexus One using XDA App
Click to expand...
Click to collapse
True, but for me I get the same results for copying files to my SD card from my PC, as I get using the 2kb buffer size setting.
What kind of speeds do you get when transfering a file to SD from PC?
damanrico said:
True, but for me I get the same results for copying files to my SD card from my PC, as I get using the 2kb buffer size setting.
What kind of speeds do you get when transfering a file to SD from PC?
Click to expand...
Click to collapse
I get the speed for 4kB (about 2MB/s) as opposed to the dismal score for 2kB. Wish I'd get the 8kB speeds (almost 6MB/s which is what my class 6 is supposed to do). One thing to note is supposedly Froyo broke something and made transferring over USB slower.
I've noticed that copying files over wifi is somewhat quicker than using the direct USB connection. A 223MB file takes about than 20 second more over USB.
damanrico said:
I'm wondering if my 8gb class 6 Transcend SD card is slow, or my phone is.
When using J Benchmark I get like 1.4 Megabyte/s write and 2.6 Megabyte/s read.
This is slow for a class 6 card.
Could some of you run J Benchmark and write their results. Please also write which class card you have (and maybe which brand).
Thanks in advance.
Click to expand...
Click to collapse
as with everyone...i get slower speed with 2 kb buffer. 1.5 mb/s write and 2.5mb/s read.
I have noticed one thing though, usb transfer is slow with my nexus one. If I use a card reader then its pretty impressive. So I guess the problem is not with our sd cards but with froyo. I may be wrong.

SanDisk 32GB Class 4 uSD card $37 - edit 11/06/11

SanDisk 32GB Class 4 uSD card $35 with shipping 10/11/11 only
http://mobile.dailysteals.com/
As of 11/06/11 $37 here:
http://www.icemonkey.com/andisk-32gb-microsd-high-capacity-32-gb-micro-sdhc-memory-card-adapter-kit
The 2 that I bought test out as class 6! Awesome read speeds too!
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Does the NOOK eat 32GB?
32GB is supported and is the max that can be added.
the class of the card really matters? If I use an 32GB class 10 on Nook it will be better than use a class 4? The nook really takes any advantage of a faster uSD card?
Class 4 and 6 Sandisk are best for use on Nook. It is the small block read and write performance that are important. That aspect doesn't factor into what Class rating a card gets which is more about large sequential access.
There are reports of stability issues when using Class 10 cards.
Deal is back on $37:
http://www.icemonkey.com/andisk-32gb-microsd-high-capacity-32-gb-micro-sdhc-memory-card-adapter-kit
These are great cards!
The 2 I bought test out as class 6!
Awesome read speeds!
Thanks for posting this! I was kicking myself that I missed out the first time they went on sale, but I have one on the way now.
Just got my sd card from icemonkey today.
Here is how it tested:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 19.184 MB/s
Sequential Write : 6.978 MB/s
Random Read 512KB : 18.783 MB/s
Random Write 512KB : 1.616 MB/s
Random Read 4KB (QD=1) : 3.412 MB/s [ 833.1 IOPS]
Random Write 4KB (QD=1) : 1.389 MB/s [ 339.1 IOPS]
Random Read 4KB (QD=32) : 3.235 MB/s [ 789.8 IOPS]
Random Write 4KB (QD=32) : 0.977 MB/s [ 238.6 IOPS]
Test : 50 MB [J: 0.0% (0.0/29.7 GB)] (x2)
Date : 2011/11/15 16:48:38
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
I have a general question about using crystaldiskmark for these tests. I used 3 different micro-sd cards that were varying brands, sizes, and classes when performing each test. The 2 write speeds that everyone seems to highlight ended up being .02 or .01 something for each card. Is that possible? I figure something was up with my computer. I'm new to testing cards like this, but these scores are so much lower than everyone else's, some even using the same cards as I am. I did the test with the internal micro-sd card reader on my PC. Am I doing something wrong? Even running the crystal test on my hard drive produced low scores in those areas.
First of all what brand and class of sd cards are you testing? Non-sandisk cards have almost all been shown not to have fast enough small block random write ratings to run CM7 satisfactorily.
Several people posting here had observed issues with sd card readers built in to their laptops/computers and used an external reader with better results.
Here is the link to the thread where extensive sd card testing was done by many of the forum participants:
http://forum.xda-developers.com/showthread.php?p=12964262
yeah I went through that whole thread before I posted as a reference and to see how to test. One of the cards was an 8gb sandisk, class 2. Another was a 2gb sandisk, class 2. Third was a 16gb something (in my phone right now and don't want to pull) that is class 10 or 6..All gave me the same results, which I would think is strange. For what it's worth, cm7 runs fast and smooth booting from my 8gb class 2 sandisk. But seeing those test results would say otherwise I would think. The 2gb sandisk booted and ran cm7 fine as well.
One thing you might want to check is if crystaldiskmark is set at 2 test runs, 50mb test size. I did a 5 test run, 500mb test size and got a really bad small block random write score around .100.
If your CM7 is running fine, then I wouldn't worry about it.
got me one thanks

How fast can ACE read an SD?

Who can really answer this one? What is the maximum speed ACE can read data from an SD?
For example a reading speed for a class10 SD can reach 20MB/sec. So can ACE really cope with that?
I am asking this cause I also have a class4 with maximum read speed at 13MB/sec.
So, is there a limit at how fast ACE can read data from an SD? It hasn't got a very powerful processor so is there really a need for a class10?
Do not tell me about write speed, that I know!
My SlaidMod script boost your SD write/read to make it very fast even with A2SD darktremator!!!
Yes I know man but that was not the question and...
...ooops, I posted in wrong section, Can a moderator please move this to general talk, thanks and sorry for that!
itasoulas said:
Yes I know man but that was not the question and...
...ooops, I posted in wrong section, Can a moderator please move this to general talk, thanks and sorry for that!
Click to expand...
Click to collapse
ah,for your question I think ACE read SD card with it's default speed
PS:you should move your thread to Galaxy ACE general FORUM
slaid480 said:
ah,for your question I think ACE read SD card with it's default speed
PS:you should move your thread to Galaxy ACE general FORUM
Click to expand...
Click to collapse
yes I noticed and asked for a moderator to do this cause I cannot (I think)
By the way your script rocks, it's included in ICS2 Final I believe!
itasoulas said:
yes I noticed and asked for a moderator to do this cause I cannot (I think)
By the way your script rocks, it's included in ICS2 Final I believe!
Click to expand...
Click to collapse
NO,It isn't my build.prop tweaks that are included not script but you can install it weven if the final ICS2 has gadgetcheck turboboost
itasoulas said:
Who can really answer this one? What is the maximum speed ACE can read data from an SD?
For example a reading speed for a class10 SD can reach 20MB/sec. So can ACE really cope with that?
I am asking this cause I also have a class4 with maximum read speed at 13MB/sec.
So, is there a limit at how fast ACE can read data from an SD? It hasn't got a very powerful processor so is there really a need for a class10?
Do not tell me about write speed, that I know!
Click to expand...
Click to collapse
don't worry. the bus speeds between the RAM module (most likely a LPDDR1 RAM) and the CPU is much much faster than that (at least 200MB/s). The bus connecting the SD card reader and the CPU also have a good bandwidth and therefore you can be sure that whatever Class rating of your SD card is, it won't go to waste.
As a side point, do take note that Class rating of different brands are not the same in real speeds. E.g. Sandisk Class 2 is faster than Kingston Class 2.
happily1986 said:
don't worry. the bus speeds between the RAM module (most likely a LPDDR1 RAM) and the CPU is much much faster than that (at least 200MB/s). The bus connecting the SD card reader and the CPU also have a good bandwidth and therefore you can be sure that whatever Class rating of your SD card is, it won't go to waste.
As a side point, do take note that Class rating of different brands are not the same in real speeds. E.g. Sandisk Class 2 is faster than Kingston Class 2.
Click to expand...
Click to collapse
I hope its not off topic.. But how do i know the class of my SD card?? It doesn't say anything on the package nor on the card itself?? Sorry if its a stupid question..
NJosh said:
I hope its not off topic.. But how do i know the class of my SD card?? It doesn't say anything on the package nor on the card itself?? Sorry if its a stupid question..
Click to expand...
Click to collapse
Nope, not stupid question no worries. Use the table as reference.
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Now go to this link to test the read/write speeds of your card.H2test2 1.4.
Just take note that this app is written by a German and so take some time to slowly navigate it. Also how this thing works is that it auto generates a file and send it back and forth from your computer and the sd card. Which means that ideally you should clear your whole card so that the utility can work. However the utility can work with whatever free space your sd card has currently. Meaning only the read/write speeds of the "empty" space gets tested, not the entire card if you get what i mean.
happily1986 said:
Nope, not stupid question no worries. Use the table as reference.
Now go to this link to test the read/write speeds of your card.H2test2 1.4.
Just take note that this app is written by a German and so take some time to slowly navigate it. Also how this thing works is that it auto generates a file and send it back and forth from your computer and the sd card. Which means that ideally you should clear your whole card so that the utility can work. However the utility can work with whatever free space your sd card has currently. Meaning only the read/write speeds of the "empty" space gets tested, not the entire card if you get what i mean.
Click to expand...
Click to collapse
Thanks for a quick and informative reply.. Im sure this will help me.. Thanks a million..

What Micro SD Card To Use Xperia Z

hi guys
whats the best micro sd card to use with the xperia z ?
I know this have probably been asked before
ive seen class 4 cards all the way up to class 10 cards
does the class even matter ???
I did seem to have an issue playing films with my 32GB Class 4 but since I've bought the SanDisk Ultra 64GB Class 10 it's been just fine.
If I am correct, 4.2.2 supports 64GB officialy.
droidhd said:
If I am correct, 4.2.2 supports 64GB officialy.
Click to expand...
Click to collapse
In exFat yes, but choose the SD you think you need
The SD Association defines standard speed classes indicating minimum performance to record video. Both read and write speeds must exceed the specified value. These are defined in terms of suitability for different applications:[40]
Class 2 for SD video recording
Class 4 and 6 for high-definition video (HD) to Full HD video recording,
Class 10 for Full HD video recording and consecutive recording of HD stills
UHS Speed Class 1 for real-time broadcasts and large HD video files
The specification defines these classes in terms of performance curves that translate into the following minimum read-write performance levels on an empty card:[41]
Speed Classes 2, 4, and 6 assert that the card supports the respective number of megabytes per second as a minimum sustained write speed for a card in a fragmented state. Class 10 asserts that the card supports 10 MByte/s as a minimum non-fragmented sequential write speed.[41] By comparison, the older "×" rating measured maximum speed under ideal conditions, and was vague as to whether this was read speed or write speed.
The host device can read a card's speed class, unlike the earlier "×" speed ratings. A device can warn the user if the card reports a speed class that falls below an application's minimum need.[41]
The speed class rating does not totally characterize card performance. Different cards of the same class may vary considerably while meeting class specifications. In addition, speed may vary markedly between writing a large amount of data to a single file (sequential access, as when a digital camera records large photographs or videos) and writing a large number of small files (a random-access use common in smartphones). One study found that, in this random-access use, some Class 2 cards achieved a write speed of 1.38Mbit/s, while all cards tested of Class 6 or greater (and some of lower Classes; lower Class does not necessarily mean better small-file performance), including those from major manufacturers, were over 100 times slower.[42]
Click to expand...
Click to collapse
Source http://en.wikipedia.org/wiki/Secure_Digital
Included in this software
There are many new features in this upgrade for your Xperia™ smartphone, some examples are:
The my Xperia application that helps you find your phone and secure everything you have on it. Read more at myxperia.sonymobile.com
New customisable navigation bar with quick settings
New widget functionalities, both on lockscreen and homescreen
Support for bigger (64GB) SD card so that you can store even more on your Xperia™
Source
Oh great, I can finally expand it up to 64 GB!
thanks guys
that has solved my question thank u
just ordered my 64GB mico sd class 10 card
cheers for the help
droidhd said:
If I am correct, 4.2.2 supports 64GB officialy.
Click to expand...
Click to collapse
Not only, JB support 64GB any version, i'm using a Micro SDXC Classe 10 64Go UHS-1 Grade 1 70MB/s since i have my Xperia Z and it's works perfectly.
Toshiba Exceria Class 10 32Gb MicroSD HC UTS...u wont regret after buying it! amazing card!
im using atm 16gb class 4 .. bcuz my 32gb class 10 was gone after i got my xperia from service -.-
Im using Transcend 32gb class 10
Work great !
Running SanDisk 64 class 10 here, loving the space upgrade from my iPhone
im currently running sandisk 32GB class 4, almost full capacity and it works great
Samsung 64 GB, Class 10
probably offering best transfert rates for its capacity
it has shown between Samsung has an edge over Sandisk Micro SD card
I was using a Sandisk 32gb class 10 ultra. But it suddenly yesterday stopped working. Was working fine. Now can't even get the pc to read it, how can that happen.
So, I just got the Z through T-Mobile and am (casually) looking into getting an SD car for it. Should I hold out until the device is upgraded to 4.2 before getting a 64gig card? I'm assuming it wouldn't be compatible beforehand.
I suppose I could look into rooting the Z as well... (I'm kinda hesitant about that, though)
Running Samsung Plus 32GB Class 10 Card.
Sent from my XPERIA Z with Tapatalk 4
Bad SD card?
I bought a generic 64gb class 10 microSD card from ebay, great seller, great reviews. but it seems that my Xperia corrupts it once in a while and wants to format it. I started it with exfat, but then learned that FAT32 is better, so did that.. but the same result, after a week , the SD card just crashed and corrupted and wanted a format, as the phone stopped reading it.
Is there anything that i'm missing, or shall i just chalk it up to bad sd card and get a sandisk or transend branded card?
It's not your card, it's a fault with the Xperia z, my class 10 SanDisk 32GB got corrupted two days ago as well, lots of folk reporting the same, seems class 4 is ok, any one confirm that?
Sent from my C6603 using xda app-developers app
SanDisk Ultra microSDHC 32 GB
I am using SanDisk Ultra microSDHC 32 GB
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SanDisk Ultra microSDHC UHS-I With SD Adapter
Form Factor microSDHC
Speed Up To 30MB/s
Capacity 32GB
Class10

Galaxy Note 4 microSD Card Thread

Hi,
Speed tests and performance.
Which works, which doesn't.
Tools.
Recommendations.
...
I assume Note4 will handle any SD card we will throw at it. But I bet there better ones and worse ones.
Sent from my SM-N910C using Tapatalk
I have samsung sd evo 64gb. Works really well. Fast and no errors yet. My past sandisk on my note 2 gave me errors and loss data
Sent from my SM-N910U using Tapatalk
What sd cards are recommended? Class 10 and above?
Jist wondering if the phone would utilize super high speed cards or Class10 is more than enough?
Sent from my SM-N910C using Tapatalk
bladefrost007 said:
I have samsung sd evo 64gb. Works really well. Fast and no errors yet. My past sandisk on my note 2 gave me errors and loss data
Sent from my SM-N910U using Tapatalk
Click to expand...
Click to collapse
Well I guess it depends on SD card. I only heard positive reviews of Sandisk flash memory.
Sent from my SM-N910C using Tapatalk
bat0nas said:
Well I guess it depends on SD card. I only heard positive reviews of Sandisk flash memory.
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You should read more reviews......Sandisk are slow and over priced.......
Mine gave me about 40MBps average write speed
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Joey2o11 said:
You should read more reviews......Sandisk are slow and over priced.......
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It really depends on what model you buy for your needs all manufacturers make slow and fast ones. I agree that Sandisk is overpriced on their MSRP but if you shop around, look for deals & price match you will get high quality for a fair price.
I just picked up a 64GB Sandisk Extreme Plus yesterday price matched down to $66.99 CAD, it has up to 80MB/s read and 50MB/s write capabilities and on my Note 4 and it did this:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
I am quite please with its performance.
Sony microSD cards and memory sticks for up to 83% off on Amazon
http://www.androidauthority.com/sony-microsd-card-discount-deal-amazon-566039/
Subscribed. Currently using the SanDisk 32gig class 10 card. Not bad. Ordered the 64 gig Samsung evo class 10 for $36 off Amazon with free shipping.
---------- Post added at 02:36 PM ---------- Previous post was at 02:34 PM ----------
Also can write, transfer, copy and paste to sd card using the stock file manager of the note 4. I've unmounted and mounted with great results. No broken icon image.
What cards are supported?
I assume all?
microSD
microSDHC
microSDXC
And what about speed classes? Both: Class 10 and UHS-1?
The question is: will all of them work and if yes then what max read write speed can Note 4 utilize?
Samsung 32gb evo and all is well.
bat0nas said:
What cards are supported?
I assume all?
microSD
microSDHC
microSDXC
And what about speed classes? Both: Class 10 and UHS-1?
The question is: will all of them work and if yes then what max read write speed can Note 4 utilize?
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All of them will work.
Maximum speed is utterly dependant on the card. I'm not sure what the theoretical maximum speed the phone could handle, but I'm sure that the card itself will be the limiting factor, not the phone.
bladefrost007 said:
I have samsung sd evo 64gb. Works really well. Fast and no errors yet. My past sandisk on my note 2 gave me errors and loss data
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Got the same thing. Working with no problems so far. As for speeds, I've never paid too much attention to the speeds of sd cards, so I couldn't give any specifics.
I've purchased the Samsung 64gb Pro card from Amazon and looking forward to using it.
It's supposedly one of the fastest.
Sent from my SM-T800
Got the Samsung 64gb Evo in mine. Not ran any speed tests...but works all good.
lukepw said:
Got the Samsung 64gb Evo in mine. Not ran any speed tests...but works all good.
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Do you record your 4K videos to SD card?
Could you run any SD benchmark with your EVO?
I read some reviews on the net and seems that EVO should be more than enough for normal Note 4 operation (recording videos, watching huge fullhd movies from mkv files).
SanDisk extreme 128 Gb SDXC
READ 72 MB/ SEC.
WRITE 50 MB/SEC
Recording 4K videos flawlessly.
Kakomanda said:
SanDisk extreme 128 Gb SDXC
READ 72 MB/ SEC.
WRITE 50 MB/SEC
Recording 4K videos flawlessly.
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What app did you use to test the speed?
bat0nas said:
What app did you use to test the speed?
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A1 SD bench
Would anybody mind to test 32 or 64GB EVO card?
1) Perform a 4K video recording to your SD card.
2) Perform a speed test with any of the test app inside your phone.
Thanks!!
I really have some doubts because this site http://thewirecutter.com/reviews/best-microsd-card/ says that for 4K recording something faster is needed than EVO.
But on the other hand: 4K recording requires only 6MB/s of sequential writing and EVO can handle up to 19MB/s (at lease every review claims that).
Thanks!!!

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