Database Develop

What size microSD cards ?

Hi all.
Just want to see what everyone is using as in size and revision.
Why i ask is HTC said ( to me anyway ) that it only takes up to 2GB microSD. On the other hand iv read on other pages they can take the microSDHC cards as well and larger than 2GB so some feedback will be cool before i go spend cash.
Thanks ahead
me

What is microSDHC?
How is it different from normal microSD

I've just bought a 4gb microsdhc card for my s730 and it's perfectly working.
(microsdhc is the new version of the microsdhc card which allow capacity over 2gb)

My 2 GB card (Sandisk Ultra II) is that fast...
write 760.68 kB/s
read 1976.20 kB/s
Hows your SDHC? (Use SKTools for benchmark)

yeap
yeap the microSDHC is a newer version of the microSD card. bigger capacity, also refered to as Rev 2 microSD.
Cool, looks like ill go for a 4GB microSDHC card
thanks...

I have a 6Gb one in mine works fine was £36.99 from PLAY.com, free delivery + Quidco points
NoNco said:
yeap the microSDHC is a newer version of the microSD card. bigger capacity, also refered to as Rev 2 microSD.
Cool, looks like ill go for a 4GB microSDHC card
thanks...
Click to expand...
Click to collapse

I'm using the 8 GB från SanDisk, and it works just fine.

I have a 6gb sdhc works without a problem.
The phone should take up to 8gb and maybe 10 before it will need a firmware update to read it.
HTC probably has only tested a 2gb.

4GB SanDisk from play.com, £17.99
Pack included a microSD>full size SD adaptor* AND USB adapter for PC!
* not micro>mini>SD as with some cards

nonco said:
hi all.
Just want to see what everyone is using as in size and revision.
Why i ask is htc said ( to me anyway ) that it only takes up to 2gb microsd. On the other hand iv read on other pages they can take the microsdhc cards as well and larger than 2gb so some feedback will be cool before i go spend cash.
Thanks ahead
me
Click to expand...
Click to collapse
well i had 2gb .......then i replace with a 4gb but didnt read the size of the 4gb and it went in as 2 storage card .....so what i did is put the 4gb in hard reset as new and the card read as a 4gb.....so much better....... I instaill everything to my card

SanDisk 8Gb class 4
Working perfect since almost a year.

I'm using a SanDisk 8gb microSDHC for about 3 months now and no issues!

sdhc 8Gb clas 6 wmtorent need storage )

8 GB Micro SD Card works too in my Touch Dual

And, SanDisk also provides a USB reader (looks more like a very cheap version of an USB Stick...
I paid around US $ 150
we

Same brand but 4 GB, works like a charm
Bundled with MicroSD -> SD and SD -> USB adapter
36€ (~ 50$)

See my previous post....
http://forum.xda-developers.com/showthread.php?t=350801
Just thought I'd add that I purchased an 8Gigabyte ScanDisk Card (with USB adapter) for just over £50 (GBP) - $100 (US) and it work like a dream - no access delay and just under 8GB of available space.
I've also heard that ScanDisk are due to release a 16GB version in early 2008?
http://www.directsaleschat.co.uk/dev...sk-157056.html

Hey,
did you need any software update in order make an 8GB card running on XDA STAR. I'm just coming from an O2 store and they gave me an extract of a spreadsheet were they listed the xda star under 2GB max. storage devices.
Any comments?
Cheers,
Yves

I bought the SanDisk Card, just pop it in and everything is set.
Best
we

It didn't work in my HTC Touch Dual!
I bought a 8GB Sandisk Micro SDHC card... put it in my Touch Dual... and bam... No more than 2GB.
How can that be?

Alusan said:
It didn't work in my HTC Touch Dual!
I bought a 8GB Sandisk Micro SDHC card... put it in my Touch Dual... and bam... No more than 2GB.
How can that be?
Click to expand...
Click to collapse
eh? that's worrying, I've an 8gb one coming this week!

8GB Sandisk working perfectly in my Uk T-Mobile Touch Plus. No issues seen at all with it.

Well... My problem here is... Is it the Flash Card that is ****ed up or is it that I have the only Touch Dual in the whole world that doesn't have the capabillity to read 8gb Micro SDHC cards.
I have used a storage tool program to figure out the cards specs(Computer can't read it through the SD adaptor for some reason) and here is what i got:
Total: 1.8 GB
Type: Fat16
Sector Size: 512 Bytes
Cluster Size: 32 KB
For what I know, this should be a Fat32 because Fat16 can't have storage space beyond 2 GB.The rest I don't know because I haven't researched this enough to get a science degree. I have tried to format the card to Fat32 with several Cluster Sizes with no result in getting a bigger storage space.
At some point this seems like a 2GB but on the outside it looks clearly like an 8GB card. So if this is a fake, then it is a pretty damn good one.
What do you think?

slight aside, but madly, i have to pick the card up from the post office depot - how BIG can that parcel be??!!

I've been using an 8GB Sandisk card in my Niki (borrowed from my Kaiser) for a week now. Works fine ...

yup, finally got mine, and no issues!

Alusan said:
Well... My problem here is... Is it the Flash Card that is ****ed up or is it that I have the only Touch Dual in the whole world that doesn't have the capabillity to read 8gb Micro SDHC cards.
I have used a storage tool program to figure out the cards specs(Computer can't read it through the SD adaptor for some reason) and here is what i got:
Total: 1.8 GB
Type: Fat16
Sector Size: 512 Bytes
Cluster Size: 32 KB
For what I know, this should be a Fat32 because Fat16 can't have storage space beyond 2 GB.The rest I don't know because I haven't researched this enough to get a science degree. I have tried to format the card to Fat32 with several Cluster Sizes with no result in getting a bigger storage space.
At some point this seems like a 2GB but on the outside it looks clearly like an 8GB card. So if this is a fake, then it is a pretty damn good one.
What do you think?
Click to expand...
Click to collapse
You have to format the card at FAT32, which goes at 32 Gb. With FAT16 you only see 2Gb.
I don't know if you can do this format in the HTC, otherwise you'll need a new reader for sdhc-cards.

Thank You... I got a New SDHC reader/writer and formatted the card with the Panasonic SDformatter from a link through this forum. It worked and I now have my delicious 8GB storage in my Touch Dual.
Never seen such beautiful 8GB in my life

8Gb works in mine as well

Hows the speed when accessing aps on the 8 gig? is it just as fast as using a 1 gig?

in light of this topic, could you guys suggest anything for this:
http://forum.xda-developers.com/showthread.php?t=383791

Oh well no answers, anyway, my 8gb is here and is working very well

Oddly enough, I'm having problems even with 1 and 2 gig cards. Or rather with active sync, not detecting them. I can't transfer files directly to storage card folder via activesync, I have to either transfer to the device first and then from the device to the card, or transfer directly to the card after taking it out of the nike..
It might be something simple, anybody has any ideas how to solve this? Searched for quite a long time and couldn't find anything..
It's an orange brand niki if that changes anything, btw.

well if any 1 wants to save i found a 8 gig for 37.99 plus shipping
http://www.amazon.com/gp/product/B0012Y2LLE/ref=cm_cr_pr_product_top#productPromotions

12 GB Micro SD

Does Anyone Know If It Can Take A 12 GB Micro SDHC If So Theres One Here For £35
http://www.flash-memory.co.uk/products/1031/sandisk-8gb-micro-sd-sdhc-card.htm

it is 8 gb not 12,
at least its what i see.
i have an 8gb and its the max i guess so far.
it will be available a 16gb in summer, i guess its still in lab

8 gb i c as well. Yeah, it will support up to 32 GB, but that wont be until next year. Plus, there is no way i need more than 8 GB. ..... Maybe 16 at MAX

It says 8gb then later says 6 gb, wonder what it really is?
Sandisk 8GB Micro SD (SDHC) Card
Part Number: SDSDQ-8192-E11M
SanDisk is proud to announce our newest format and capacity to the SD card family: microSD High Capacity (microSDHC) 6GB flash card. Included as bonus is our new MicroMate™ SD/SDHC compatible, high-speed USB 2.0 Reader! This will help ensure your transition from the microSD format to the... Read more...

6 GB Sandisk
I have the 6 GB Sandisk and all is fine except that I can't save the camera photos on it

6gb Sandisk microSDHC
Im also using a Sandisk 6gb microSDHC in my Bell Vogue and its working fine all the way, no problem at all.

I was thinking about picking this up today
SanDisk - 8GB microSDHC Memory Card

I ended up buying a ADATA 8GB MICRO SDHC TURBO class 6 https://shop2.frys.com/product/5576250?site=sr:SEARCH:MAIN_RSLT_PG

8GB here, between the RAM, Main Storage, and the SD, I've got plenty of memory!

deepeyes that is a class 4... see the 4 with the circle around it... that indicates ur class speed

Memory Card Benchmarks 2gb v 16gb

All,
Just thought i'd let you know the benchmarks I got from the exisiting 2gb card and a new 16gb card I've bought.
The card I've bought is the new Sandisk Class 4 Ultra micro sdhc which cost me £50 from Amazon.co.uk. I was a bit sceptical at first as the 2gb seemed quite fast so wondered what class it was as it doesn't say and I didn't want the new card to be slower. But I went ahead and bought it anyway as i needed the space.
Both cards are formatted to fat32 with 4096 of allocation
So, CrystalDiskMark benchmarks...
100mb file, 3 passes...
Code:
100mb file Sandisk 2gb Sandisk 16gb
Read Write Read Write
Sequential 10.67 6.639 19.93 16.57
Random Write 512k 10.55 1.261 19.52 2.634
Random Write 4k 2.822 0.010 3.984 0.026
Speeds are in MB/s
Quite a bit faster than I was expecting, so quite happy about this. I know there will be some hardware limitations in the phone so it can only read / write at certain speeds, but for taking pictures, it can save the images quicker and thats a plus for me. Plus the reading of data in music player etc...
Hope it helps some people

nicelad_uk said:
All,
Just thought i'd let you know the benchmarks I got from the exisiting 2gb card and a new 16gb card I've bought.
The card I've bought is the new Sandisk Class 4 Ultra micro sdhc which cost me £50 from Amazon.co.uk. I was a bit sceptical at first as the 2gb seemed quite fast so wondered what class it was as it doesn't say and I didn't want the new card to be slower. But I went ahead and bought it anyway as i needed the space.
Both cards are formatted to fat32 with 4096 of allocation
So, CrystalDiskMark benchmarks...
100mb file, 3 passes...
Code:
100mb file Sandisk 2gb Sandisk 16gb
Read Write Read Write
Sequential 10.67 6.639 19.93 16.57
Random Write 512k 10.55 1.261 19.52 2.634
Random Write 4k 2.822 0.010 3.984 0.026
Speeds are in MB/s
Quite a bit faster than I was expecting, so quite happy about this. I know there will be some hardware limitations in the phone so it can only read / write at certain speeds, but for taking pictures, it can save the images quicker and thats a plus for me. Plus the reading of data in music player etc...
Hope it helps some people
Click to expand...
Click to collapse
quite an impressive hike in write speeds.
I did wonder about the transcend class 6 they have for £55 but then I realised it said 2-3 months expected delivery !
In the end I bought the PNY 16gb card from play for £26 it's supposed to be a class 4 I'll benchmark it when it arrives.

quite impressive
congrats mate for the new card
However, i guess it makes more sense if the larger card volume was a bit slower!
Anywayz, doesnt the bigger card have any negative effect on the battery in terms of consuming more power to mount the storage volume?

Interesting - I have a 16Gb Class 6 on it's way - should be here next week. I'll try and run the benchmarks for it and see if there is much difference.

would be nice if someone could try the class 2 sandisk 16 gb
how did you do the benchmark?

fards said:
quite an impressive hike in write speeds.
I did wonder about the transcend class 6 they have for £55 but then I realised it said 2-3 months expected delivery !
In the end I bought the PNY 16gb card from play for £26 it's supposed to be a class 4 I'll benchmark it when it arrives.
Click to expand...
Click to collapse
PNY card class 4 - where from?

I too have a class 6 16GB card on it's way and I will post my bench's as soon as it gets...

I won't buy a higher one than my 8GB one till a 32GB is released -.-

gavinfabl said:
PNY card class 4 - where from?
Click to expand...
Click to collapse
PLAY..
play.com here > >http://www.play.com/Mobiles/Mobile/4-/11540450/PNY-16GB-Micro-SDHC-Memory-Card/Product.html
the article says class 2, the review says class 4. One of my friends bought one, his is class 4.
Obviously I won't know till mine arrives !
the PNY site isn't much help
http://www.pny.eu/products.php?section=product&categoryid=4&subcategoryid=54&productid=296

Sandisk 8gb class 4 test results (similar to the 16gb class 4)-
Code:
--------------------------------------------------
CrystalDiskMark 2.2 (C) 2007-2008 hiyohiyo
Crystal Dew World : http://crystalmark.info/
--------------------------------------------------
Sequential Read : 20.268 MB/s
Sequential Write : 16.100 MB/s
Random Read 512KB : 19.866 MB/s
Random Write 512KB : 3.009 MB/s
Random Read 4KB : 4.124 MB/s
Random Write 4KB : 0.028 MB/s
Test Size : 100 MB

an idea for you all..... check your local cash converter/pawn shop. i found a lot of micro sdhc card in there.
got my self a samsung 8GB class 6 for 12.00 pounds ! (with 1 year warranty)
they also had a 16gb class 2 for 22 pounds.

Two more cards
I was using the Sandisk USB to MicroSD adapter that ships with Sandisk cards.
I get the feeling that this is limiting the benchmark results
I get
Sandisk 8Gb Class 4
Read Write
SEQ: 19.69 13.19
512k: 19.26 2.337
4k: 3.601 0.021
Kingston 16Gb Class 2
Read Write
SEQ: 19.61 6.729
512k: 19.39 1.091
4k: 3.567 0.024

Sorry guys, but I don't get it. If you buy a card to use it with your Leo these tests are pretty irrelevant. I tested myself several cards, 2GB, 4GB and 16GB, class 2 and 4, both in my PC using ATTO benchmark and in my Leo. I came to the conclusion that a class 2 micro SD card is plenty fast enough when reading/writing with the Leo, so what is the point of spending a little fortune on class 6 cards? The Leo is no high-end DSLR you know...
Using happily a 16GB Sandisk that I purchased in my local PC shop for about 35 Euros. The Leo peaks at 5.2/8.6 MB/s write/read with this card. It did exactly the same with a class 4 4GB Toshiba card and a 2GB class 4 Kingston card. Tested using ATTO Disk Benchmark v. 234 on a core i7 system running Windows 7 64 bit OS.
In my view, the ATTO benchmark is reat because it gives you a speed snapshot at different file sizes, not just the peaks. I wonder what file size is used when manufacturers clasify their cards. Let me tell you, when transfering files smaller that 1 KB, they're all bloody snails, from class 2 to class 12!

atomic_dude said:
Let me tell you, when transfering files smaller that 1 KB, they're all bloody snails, from class 2 to class 12!
Click to expand...
Click to collapse
I hear that, took ages to delete Igo8 off the SD card with all those small files
I prefer the faster cards, say class 4 or even a class 2 if it can perform like this current class 4 because I don't just use it in my phone. I use the card reader and transfer music / videos / pictures etc and with the clip battery cover, it only takes a minute to hot swap.
I know what you mean though, the phone does have limitations which make the cards only work to a certain speed, thats the same in most devices.
All in all though, nice to get some comparisons on here for people who want to know before they buy

16gb card came from play today.
It is class 2, clearly marked as such, so either they are sending out from different sources or something is up.
Either way it's a pretty quick card, I'll benchmark it later on

I was waiting for a 32gb card to be released but that doesn't look like it is going to happen any time soon...
So I am buying a 16gb card. I am going to be using the card in my phone only. Out of these 2 cards which would recommend -
16gb Kingston class 4 or a 16gb Peak class 6 (for a couple of pounds extra)
Part of me wants to go for the class 6 for the speed (but will I really notice it in a phone?) but on the other hand Kingston is a well known brand and I have never heard of Peak.
Thanks

What would you say is the minimum class that i could get a decent experience when playing music/movies and launching apps?

A class 2 card would do the job nicely.

Thanks, will probs get a class 2 16GB one

fards said:
16gb card came from play today.
It is class 2, clearly marked as such, so either they are sending out from different sources or something is up.
Either way it's a pretty quick card, I'll benchmark it later on
Click to expand...
Click to collapse
Took your advice and bought the 16gb one you recommended from play too in the hope it was Class4. No idea what Class it actually is but its definately quicker than the previous 2Gb, and 8Gb cards I had in it! - I can tell cus when I wizz through the photos in landscape mode they appear almost instantly whereas the other cards took time to load them up. or maybe thats cus of this new ROM - I'm not sure.....hmmm....

HD2 Memory 32G $99 CLASS 4!

Kingston 32GB Micro SDHC Flash Card with MicroSD Reader Gen 2 Model MRG2+SDC4/32GB
Average Rating 5 out of 5 eggs5/5(1 reviews)
In stock.
Now: $99.99
*
Free Shipping (restrictions apply)
Additional fees may apply to shipments to AK, HI and PR.
At New Egg!

This is worth it, take it from someone who was looking for something other than SanDisk 32GB C2 I have been waiting for Kingston's 32GB C4 for long time and when it came out I got it though offical site for $159.

Yeah, I ordered one of these last week from newegg along with an otterbox defender case for $33 w/free shipping for both.... not too bad at all. Should be getting them today. Has anyone used the Kingston class 4 32gb card for running android on the hd2?
Sent from my HTC HD2 using XDA App

Well, far as I know people do claim the R/W IOPs for HD2 when card inside the device won't go beyond class 2 rate but some who did use class 4-6 cards said they did see major improvement in terms of loading OS/Apps from mSD card. Anything beyond class 4 is an overkill on HD2 that I accept unless you are moving around massive amount of data and use HD2 as your mean to transfer it, in that case just buy thumb drive.
"Sent from my PC using THE hand" lol

I was in a Fry's Electronics the other day and I saw a 16gb Class 10 microsd card for $32.00. Don't remember the maker but it was not name brand, that is extremely questionable

wow
my videos which are about 12g play almost instantly now i love this card and the free usb reader, thanks kingston

Ya this card was worth waiting for hell I shot up an storm in this section comparing other vendors. Now I have the SanDisk 16GB C2 card not sure what to do with it, hopefully I can sell that cheap.

same
stuck with the sandisk

I ordered this 32GB class 4 card from Kingston and it is much slower then my old SanDisk card. Booting Android took over 5 minutes and after that the device still is VERY slow.
With its card reader I could copy my files onto it with 3-4MB/s.
Then I installed SKTools under Windows Mobile and used its benchmark tool to compare my SD Cards:
My old SanDisk 8GB card (stock one from the blackstone, afaik class 2): ~6,6MB/s reading and 1,1-1,5MB/s writing
The new class 4 32GB Kingston card: ~2,2MB/s reading and 500-700KB/s writing
So I can't use Android with this crappy SD card.

Ya IDK man same on my end. Took me 25min to traf 320mb files, ATM showing me 116min to traf 4.1gb.

i got kingston 23gb class 4. really disappointed takes forever to transfer. but speed test shows its class 4.
http://forum.xda-developers.com/showthread.php?t=861232
oh yeah i got the one from frys it rocks to bad its not 32gb.

I would stick with SanDisk.
I wanned to try out a faster card so got a class 6 Kingston 8gb.. while it loaded things faster, it caused severe stuttering and lagginess at times.
Upon reserach i found, kingston, and many other cards are not the same quality grade as sandisk, i am told in order to be price competitive they buy crap from others at cheap and stick thier name in it. And sometimes they buy rejects from sandisk, toshiba, samsung etc and brand them.....
Unfortunately i cant remmeber the links i researched....
So i would stick with sandisk, or another proven manufacturer....

UThis is total BS, I started it at like 6PM and now its 10:40PM and still 78min's to go WTF and its just 4.2GB music files avg at like 3-6mb/ea. Now I remember putting the whole dir in SanDisk 16GB Class 2 in less than 40min. So WTF does it take so long? Also as I wrote to Kingston CS ill share it here.
To make the file transfer go faster you have to directly allocate the file in memory thus saving time for R/W IO access. I did test many times but I am not even sure HD2 is following SD 2.0 or is it just this POS card no were close to even the stock SanDisk's.
Test: Dir with 5 files at 5mb/ea so thats 25mb. If you copy each file you reduce the time by 3x but if you copy the dir all the objects inside takes time to allocate for some reason.
PS: I am thinking about now getting SanDisk 32GB Class 2.
***UPDATE***
3.85GB
Write
--------
SanDisk 16GB Class 2 = 26min
Kingston 32GB Class 4 = 191min

HyperNode said:
Ya IDK man same on my end. Took me 25min to traf 320mb files, ATM showing me 116min to traf 4.1gb.
Click to expand...
Click to collapse
I also don't understand this.. I have a 16gb C2 card and wanted to experiment a lot with the various android roms out there, so thought a C4 would be the answer. ordered a 16gb C4 and it is always slower than the C2. a full 30 seconds on booting Android.
This confuses me.....okay okay .. thats not hard to do, but as far as I'm concerned if a card is rated at twice the "constant" speed of the other .. it should be faster...
<fx: scratches head and moves on>

HyperNode said:
Well, far as I know people do claim the R/W IOPs for HD2 when card inside the device won't go beyond class 2 rate but some who did use class 4-6 cards said they did see major improvement in terms of loading OS/Apps from mSD card. Anything beyond class 4 is an overkill on HD2 that I accept unless you are moving around massive amount of data and use HD2 as your mean to transfer it, in that case just buy thumb drive.
"Sent from my PC using THE hand" lol
Click to expand...
Click to collapse
I think it really depends on the card and not the class. I have a couple of Class4 and Class6 cards with identical builds of android and my class2 16gb continually outperform them in boot times and general speed. Class only designates write speed and there is a lot more to an SD card's performance that is not captured in the class designation.

ATM I am thinking about returning the Kingston 32GB C4 as I spoke to Kingston Tech Support and might go with SanDisk 32GB C2. Alot of people say SanDisk is superior and is faster for some reason and getting close to class 4 rating.

HyperNode said:
ATM I am thinking about returning the Kingston 32GB C4 as I spoke to Kingston Tech Support and might go with SanDisk 32GB C2. Alot of people say SanDisk is superior and is faster for some reason and getting close to class 4 rating.
Click to expand...
Click to collapse
I can only quote my experience and that is that kingston C4 is NOT fast at all.
Good luck to you.. and if you find the San Disk C4 is sooo much faster than the C2 can you report back please .. ?? So I can go get one

I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i thought that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??

gothikserpent said:
I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i thought that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??
Click to expand...
Click to collapse
LOL you are way to funny man as you said "I just bought a kingston 32gb class 6 micro sdhc" and then on top of that "Turns out that it is authentic".
I am guessing you got this card from eBay? If thats the case then its fake ill tell you why as there is no Kingston 32GB Class 6 card ATM. My best bet is you do extended data testing on it and verify the content to make sure its not corrupted. But if I was you I wouldn't do any of this as ill return that POS, why take chance with your data? Also NEVER buy memory cards via eBay or else you will be pwned with notorious chinese fakes.
But for those who actually thinking about buying the legit Kingston 32GB Class 4 microSD read below and think twice.
STHNS said:
Here this might be helpful to you.
Code:
df /dev/mnt/sdcard
File system: FAT32 (0x0c)
Used space: 16.0 KB (16,384 bytes)
Free space: 29.8 GB (32,073,891,840 bytes)
The data below is the actual IOPs from System (USB: Standard-A) to Device (USB: Micro-B) via USB (USB 2.0/SD 2.0). I am not using any type of card reader for this test as we only want the actual data rate of the card itself natively while its mounted in the device.
Subject: Kingston 32GB Class 4 (4MB/s) microSDHC.
Sequential Test Data (Block Size = 1024KB|0 Fill = 0x00)
Read [MB/s]: 13.07+11.72+13.11=37.9/3=12.63
Write [MB/s]: 4.080+3.339+1.592=9.011/3=3.00
Sequential Test Data (Block Size = 1024KB|1 Fill = 0xFF)
Read [MB/s]: 13.07+13.10+11.61=37.78/3=12.59
Write [MB/s]: 3.659+2.618+3.607=9.884/3=3.30
Mode: Low level R+W+V initialization
Data volume: 30588MBytes
Patterns: 18 sets, 8 of "walking one", 8 of "walking zero", 55h, AAh
Writing speed [03:24:28]: 2.49 MByte/s
Reading speed [00:44:20]: 11.5 MByte/s
Burst write: 4.0+4.0+4.0=4.0 MB/s
Burst read: 10.0+9.0+9.0=9.33 MB/s
Click to expand...
Click to collapse

It's class 4 but it's very expensive.. too much money for just a SD card