Database Develop

UHS-1 MicroSD

Dear readers,
I'm searching a for a new SD card for my HD2 for a while now and wanted to buy a 32gb class 10 microsd card from samsung.
But then i saw a new cards with new classes called "UHS".
I also saw one of them having the class 6 and the UHS class.
I have a few question regarding this:
1. Does this UHS class work on the HD2?
2. Is it possible for a card to have a normal class and a UHS class?
3. if not, are UHS 1 cards as fast as class 10 cards on devices that do not support UHS?
4. How can UHS 1 be cheaper then class 10?
adata 32gb micrsosd UHS 1: cant post url...
the same card for 22 euro's: cant post url...
samsung 32gb microsd class 10 for 26 euro's: cant post url...
I hope this topic will answer the the questions i think other people have too.
kind regards,
4rjan

Can't answer for sure if they are 100% compatible with HD2 hardware(there is certain hardware requirement for UHS), but in theory any speed after class 8/10 is pointless. Class 10 is close to HD2 hardware bandwith limit. You won't benefit that.

Nobody??

I was also looking for a 32GB class 10 card and found the UHS-i type, but in the reviews i saw said about compatibility issues in non compatible devices or transfer speeds relatively low in devices without UHS-i compatibility.
To avoid problems i purchased one Samsung Class 10 card, works perfectly in my HD2 and don't have to worry.

That is exactly what i thought, that the uhs-i has a lack of performance on not supported uhs-i devices and that they are not completely backwards compatible to normal class 10 speed.
Do you maybe have a URL of those complaints?

hardan said:
I was also looking for a 32GB class 10 card and found the UHS-i type, but in the reviews i saw said about compatibility issues in non compatible devices or transfer speeds relatively low in devices without UHS-i compatibility.
To avoid problems i purchased one Samsung Class 10 card, works perfectly in my HD2 and don't have to worry.
Click to expand...
Click to collapse
That would be expected for transferring relatively small files and using windows formatting as the random read/write speed (most frequently used) will be slower with a higher class, whereas the sequential read/write speed will increase. This may beneficial for users with WP7 but if you use it anywhere else it will seem much slower.
Sent from my T9193 using xda

But do UHS class 1 cards run ass class 10 cards when they are used with non supported UHS devices? If it is true what you guys are saying then its not.
I can't find anything about it on the English Wikipedia, but on the dutch Wikipedia it says it runs like class 10 on non supported devices:
http://nl.wikipedia.org/wiki/SD-kaart
UHS: MB (Megabyte) Mb (Megabit)
UHS Class 1 10 MB/s (min) 80 Mb/s (min)
UHS-I 104 MB/s (max) 832 Mb/s (max)
UHS Class 2 105 MB/s (min) 840 Mb/s (min)
UHS-II 300 MB/s (max) 2400 Mb/s (max)

Home » Frequently Asked Questions » Memory Card
WHAT IS UHS-1 ?
"UHS-1" or more accurately "UHS-I" stands for "Ultra High Speed" - 1 and is a speed class for SDHC and SXDC memory cards.
UHS-I is the fastest category of card available today with a bus interface speed of up to 104 MB/s.
An SDHC UHS-I card will work in any SDHC compatible device at lower speeds, but to take advantage of the UHS-I speed, a UHS-I compatible device is essential.

omidz said:
An SDHC UHS-I card will work in any SDHC compatible device at lower speeds, but to take advantage of the UHS-I speed, a UHS-I compatible device is essential.
Click to expand...
Click to collapse
the question is what are those "lower" speeds?

4rjan said:
the question is what are those "lower" speeds?
Click to expand...
Click to collapse
The speeds would be the Class 6 or Class 10 speeds, depending on what's listed on the card. Of course, even that can be bottlenecked by your device's cache.

UHS-I doesn't work nice!
I try to use a SanDisk 16GB class10 Ultra MicroSd HC-I but as I found out it doesn't feet with my HD2 EU..... ...Although it works very smooth and fast after some hour my phone just freezes....only the light of the hardbuttons works...screen turns black...I take off the battery...and all this sadness comes to my face...
So I got back to my Transcend 16GB class10 and everything works almost fine (a little bit slow sometimes, so I use sd card boost and swapper2).
You can see by yourself ...the mmc driver has not included UHS mode...

UHS vs CLASS
The UHS means it has content transfer speed of minimum 30mbps to maximum of 104mbpswhen you transfer the content from MicroSD to System(PC)....but the data write speed on the MicroSD depends on the CLASS mentioned on it i.e., CLASS 10 has MAX write speed of 10MB/S......(Note: all this speed transfer test will use top speculated system configurations so it may vary on our PC's).

Hello,
Just to echo what a few people have said elsewhere and clarify something. Using an SDcard with a UHS classification may well cause your HD2 to hang, black screen, freeze, crash .... especially when using certain ROMs. Some seem more resilient than others, but the NativeSD ROMs in particular rely heavily on accessing the SDcard. The only way to reset after a blackscreen is to remove battery and reboot.
The HD2 was never designed to work with these cards and they require specific voltages from the phone hardware in order to run correctly. The HD2 does not have such hardware. I used a Sandisc 16GB Class-10 UHS-1 card and my phone would hang/crash 7-10 times each day. After replacing it with a Class-10 Kingston card with no UHS classification, the phone runs fine. Nothing else was changed except the SDcard. The exact same installation was used by cloning the SDcard partitions. Consequently the phone runs fine now.
Just thought I'd post up in case it helps others.
Would appreciate if someone could mirror this post for me (I have less than 10 posts on XDA and don't want to spam the forum just to get them) on this thread for [ROM][4.1.2][720p] NexusHD2-JellyBean-CM10 V1.5 [NativeSD] because a few people were complaining of bugs and it's nothing to do with the ROM itself, more the memory cards they are using.

doctorasgr said:
I try to use a SanDisk 16GB class10 Ultra MicroSd HC-I but as I found out it doesn't feet with my HD2 EU..... ...Although it works very smooth and fast after some hour my phone just freezes....only the light of the hardbuttons works...screen turns black...I take off the battery...and all this sadness comes to my face...
So I got back to my Transcend 16GB class10 and everything works almost fine (a little bit slow sometimes, so I use sd card boost and swapper2).
You can see by yourself ...the mmc driver has not included UHS mode...
Click to expand...
Click to collapse
Use 32GB Sandisk class10 Ultra UHS HC-I without a single issue. Did want the mobile Ultra class 6 to be safe but sent me class10 UHS but worked out fine ...

Mister B said:
Use 32GB Sandisk class10 Ultra UHS HC-I without a single issue. Did want the mobile Ultra class 6 to be safe but sent me class10 UHS but worked out fine ...
Click to expand...
Click to collapse
:thumbup:
Enviado desde mi GT-I9300 usando Tapatalk 4 Beta

Very strange,i using a Sony 8GB UHS-1 and it works fine with all roms (dataonext,nativesd).I'm thinking to buying a Sony 16GB UHS-1

I am using SanDisk ultra 16Gb UHS-1 card without any issue for some time now with many different ROMs. I would rather bet that not original (Kingston, Sony, no names) that looks like original cause that.

guys what do you think about this card http://youtu.be/PuHfmuJ8pf0.... I am about to buy a new 32gb card for my new phone.
please give suggestions....

Samsung Evo+ 128gb or SanDisk Ultra 12gb ?

I was looking at these two memory cards online. The evo+ 128gb is around £40 and the ultra 128gb around £33. Out of the two which should I go for putting inside my s7 edge. Which one has better performance and reliability.

both are good, go with scandisk for cheaper price.

check this article
http://www.phonearena.com/news/Thes...our-Galaxy-S7-S7-edge-LG-G5-or-HTC-10_id80277
and you have this post about microsd.
http://forum.xda-developers.com/s7-edge/accessories/suggestions-microsd-t3321569
I recommend to take SanDisk Extreme Plus UHS-I U3

Don't get the Sandisk Extreme Plus 128gb. It's $200-$300 and has almost zero availability.
If you want to save money and get a fast 128GB microsd card, go with the Samsung EVO+ (i use this in my S7e).
If you want to spend $100, get the Samsung Pro+ 128gb card.
Both Samsung and Sandisk are reliable.
As far as performance of the two cards you listed....
Samsung EVO+ -- READ 82, WRITE 26
Sandisk Ultra -- READ 92, WRITE 19
Get the EVO+. Write speeds are more important than the read speeds, especially if they are higher than 70mb/sec (both are).

Correct me if I'm wrong but isn't for a phone the random write speed the more important figure vs. the sequential write speed you listed?

Personally id go with the samsung evo.

Only if you elect to use the Adoptable Storage option in Android 6.0. If not, sequential write speed would be the key field.

Whichever is cheapest at the time of purchase. You'll notice no difference once it's in the phone.

I ended up going with the 128 GB Pro + - can be had for $90. Much higher write speeds than the Evo +. The new 256 GB Evo + might match or even outclass the 128 GB Pro +, but at $250... I'll pass.

Micro SD Card Recommendation

I got my wife a Moto X4 from Project Fi. She's excited to be able to dump an extensive music collection onto an SD card. We've been using Nexus devices for 5 years or so now, so we've never had to buy a micro SD card.
I assume this is going to work similar to how last year's Moto Z Play worked:
https://motorola-global-portal.custhelp.com/app/answers/indevice_detail/a_id/113319/p/30,6720,9835
I don't see any need to register the SD card as internal storage (which would replace the internal storage. 32 GBs seems more than adequate for apps and photos). So it seems likely that most of the mid range cards on amazon would be fine.
That said, the price drop on some of these cards since I looked last is kind of mind boggling. Both of these 128GB Samsung cards seems like it could function as an internal card if we choose:
https://www.amazon.com/dp/B0118LR9Z8/ref=cm_sw_r_tw_dp_x_-Zs3zbDC3X0N1
https://www.amazon.com/dp/B073JYC4XM/ref=psdc_3015433011_t2_B0118LR9Z8
Anyone have any experience here that would be useful to know?

I always try to buy memory from the company who actually manufactures the chips, so Samsung and Sandisk are great companies to buy from.
I would also check out this one: https://www.amazon.com/Samsung-MicroSD-Adapter-MB-ME128GA-AM/dp/B06XWZWYVP. Much faster speeds, low price, and great reviews.
Here are the benchmarks for all 3 chips:
Brand: Samsung
Model: EVO+
Speed Class: U1
UHS: UHS-I
Write / Seq: 22.6
Read / Seq: 91.6
Read / But: 89.2
Write / Ran: 32.4
Rated Read: 80
Rated Write: 20
Brand: SanDisk
Model: Ultra
Speed Class: C10
UHS: UHS-I
Write / Seq: 23.6
Read / Seq: 91.3
Read / But: 90.2
Write / Ran: 27.1
Rated Read: 90
Rated Write: N/A
Brand: Samsung
Model: EVO Select (MB-ME128GA/AM)
Speed Class: U3
UHS: UHS-I
Write / Seq: 84.4
Read / Seq: 86.8
Read / But: 82.9
Write / Ran: 77.0
Rated Read: 100
Rated Write: 90
As you can see, the U3 chip is MUCH faster when writing. If you're copying a large music library, that's the difference between 20 minutes, and 80 minutes. Since it's the same price, go for the faster chip.
The only exception I could see a case being made is if you like the more "rugged" specs of the Evo+. Waterproof, shockproof, Xray-proof, etc. Although my personal opinion (which includes 3 years of data recovery on flash cards), I wouldn't bother. If you can insert the SD card into the phone without damaging it, you're all set. There is almost never any physical damage that happens to an sd card once it's inside a phone. Electrical damage is possible, but that will happen regardless of the card you're using.

Thanks for this, Just bought the Samsung Evo Select U3

Economical micro SD card
The Moto X⁴ manual only has two statements about the external storage:
"Tip: use a Class 10 microSD card for better user experience."
and
"Note: your phone supports microSD cards up to 2TB."
The second statement implies that the system is capable of using the SDXC Standard. So far, so good. The "Class 10" tip isn't telling us what the actual hardware is, i.e. whether or not it supports UHS-I, UHS-II, or USH-III bus speeds. (I suspect that it is limited to UHS-I due to something I saw on the Moto Z documentation.)
If we could get a definitive answer on this issue, it would be a relatively simple matter to translate the specifications to the product marketing designations. That way we wouldn't end up paying for hardware that goes unused and that might even cause the system to use sub-optimal fall back capabilities.
If you want to be as confused as I am on the matter, I suggest a visit to the SD Association website. (I can't link yet.)

Hello sorry for the necro but I just bought a Moto x4 and I’m looking to buy an sd card. Has anyone figured out what the max read/write speed of the phones sd slot is? There’s cards now advertising (up to) 300 MB/s read and write so I’m just wondering what my options are and the best way to spend my money. Thanks.

I ended up getting the SanDisk 64GB Ultra microSDXC UHS-I 100MB/s, C10, U1, Full HD, A1, SDSQUAR-064G-GN6MA and was satisfied.
https://www.amazon.com/gp/product/B073JYVKNX

NOTE 9 sd card slot speed rating

Hello,
has anyone been able to figure what the sdcard ratings are on this?
is it UHS ii?
can anyone post their write speeds?( people with sd cards anything under UHS i/ v30 please dont bother posting)
edit:
Also, to unify results can everyone use Androbench app?
And be sure to go to settings and point your ext sd card.
thanks

ain't anyone interested/curious in how fast their transfer rate to their sd card is? gues because it has nothing to do with facebook or antisocial media then it doesn't count as being a real thing...

if you have Solid Explorer you can visually see your transfer speed.
transferring the same file across different phones / SD cards can give you a comparison.
i believe the bottleneck is the SD card, as the phone is capable of transferring at speeds far beyond what the SD card is capable of. so even if the Note 9 can transfer faster than the other phones, the SD card will limit it to a fraction of its capable speed.

check Notebookcheck.net
Also most of the phone is stuck at <100MB/s for SDcard transfer rate atm. I don't know why but, maybe to prevent heat generated.
You can get an UHS-II TypeC card reader ya know. or get 512GB for full UFS 2.1 speed.

bober10113 said:
ain't anyone interested/curious in how fast their transfer rate to their sd card is? guest because it has nothing to do with facebook or antisocial media then it doesn't count as being a real thing.
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Click to collapse
No not really. Different files and sizes transfer at different speeds. Also, you're basically stuck with whatever speeds you get as there are very few ways to 'optimize' or 'tweak' performance of a SD card. And besides most people are still buying MP3s. Why? I don't know. Ain't anyone interested in listening to CD quality music? Myself, I still buy compact discs and rip them into FLACs and MP3s when I get it then the CD mostly collects dust.
And some of us are waiting on 512GB cards from Samsung and SanDisk to come out. No point in buying a 400GB card when I know I will get the 512 when the price comes down.

all this is fine and dandy but i was expecting actual file transfer read and write data numbers.
none provided their current rates. all other info is irrelevant.
thanks

I'd be interested to know the slot speed rating as well. Currently the phone defaults to using the internal capacity to write to for things like high-end video recording, due to the external SD not being fast enough.
...But is that actually due to the slot speed not being fast enough? Or because the vast majority of users will use standard SD Cards, which aren't fast enough to keep-up and it would cause complaints. Would be nice to find out it's the latter, I wouldn't mind investing in a faster SD Card for a little boost in performance.

Although I don't know the specifics for the Note 9. The SD card reading hardware on the device is the bottleneck and a source of where all manufactures go cheap. The read and right will top out between 60MB/s to 70 MB/s. This is why the internal storage is preferred but I the device for use and the main thing people overlook when it comes to devices with expandable memory. Expandable storage is simply meant for storage and not for high quality video recording and bust, super slow-mo, and other high quality video and image writing.

jcsww said:
Although I don't know the specifics for the Note 9. The SD card reading hardware on the device is the bottleneck and a source of where all manufactures go cheap. The read and right will top out between 60MB/s to 70 MB/s. This is why the internal storage is preferred but I the device for use and the main thing people overlook when it comes to devices with expandable memory. Expandable storage is simply meant for storage and not for high quality video recording and bust, super slow-mo, and other high quality video and image writing.
Click to expand...
Click to collapse
4k video takes about 100- 150Mbs on a high end camera. That's about 18 MB/sec write speed. All the medium/high quality sd cards can do those speeds...

calinormy said:
4k video takes about 100- 150Mbs on a high end camera. That's about 18 MB/sec write speed. All the medium/high quality sd cards can do those speeds...
Click to expand...
Click to collapse
Yes, but most cards don't reach their advertised potential and multiple simultanious writes impact speeds a lot more. This is why there are 512GB devices and why they still sell. The average person won't max out the capability of the SD slot but you always get a few that will use the device well beyond what most of us will.

I'm getting read 73.41mb/s Write 31.85mb/s with the 256gb card that came free with the note 7. Also note, I only have about 47gb free on it so that may affect the results.
https://www.amazon.com/gp/product/B...U3FV8&linkId=7c4bd977c420841b12df0b4adde20239
2nd test 71.35 read & 37 write

aznmode said:
I'm getting read 73.41mb/s Write 31.85mb/s with the 256gb card that came free with the note 7. Also note, I only have about 47gb free on it so that may affect the results.
https://www.amazon.com/gp/product/B...U3FV8&linkId=7c4bd977c420841b12df0b4adde20239
Click to expand...
Click to collapse
I use a Samsung EVO Plus 128GB card. 68MB/s sustained read and 62MB/s sustained write, using a 28GB 4k Blu-Ray rip. The card can read 100MB/s and write 90MB/s but those speeds are only close to achievable when plugged into my USB 3 card reader.

It's rated at 100 gigawatts.

aznmode said:
I'm getting read 73.41mb/s Write 31.85mb/s with the 256gb card that came free with the note 7. Also note, I only have about 47gb free on it so that may affect the results.
https://www.amazon.com/gp/product/B...U3FV8&linkId=7c4bd977c420841b12df0b4adde20239
2nd test 71.35 read & 37 write
Click to expand...
Click to collapse
now that is exactly the info i wanted to see.
you sir are a gentlemen and a scholar.
in the hopes that you serve as an example for the masses.
regards,

suzook said:
It's rated at 100 gigawatts.
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Click to collapse
heh.. thx Doc

jcsww said:
I use a Samsung EVO Plus 128GB card. 68MB/s sustained read and 62MB/s sustained write, using a 28GB 4k Blu-Ray rip. The card can read 100MB/s and write 90MB/s but those speeds are only close to achievable when plugged into my USB 3 card reader.
Click to expand...
Click to collapse
68MB/s sustained read and 62MB/s sustained write
in the note 9?

Also, to unify results can everyone use Androbench app?
be sure to go to settings and point your ext sd card.
thanks

bober10113 said:
68MB/s sustained read and 62MB/s sustained write
in the note 9?
Click to expand...
Click to collapse
Yes, but it is a large file. Read and write speeds tend to start off a bit better and should be a bit better for smaller files.

jcsww said:
Yes, but it is a large file. Read and write speeds tend to start off a bit better and should be a bit better for smaller files.
Click to expand...
Click to collapse
no problem, tests are encouraging. i have the evo plus 256gb and and on the note 8 was getting barely 10 MB/s write speeds.
on the computer was getting the advertised speeds on an UHS 3 reader.

Samsung EVO+ 256GB UHS-I microSDXC U3 (exact same as aznmode above).
Using the AndroBench app:
1st Run:
Read: 76.1mb/s
Write: 31.01mb/s
2nd Run:
Read: 77.24mb/s
Write: 29.56mb/s
As a reference, the internal memory bench is:
Read: 747.8mb/s
Write: 189.0mb/s

Does the S10 offer UHS-II memory card support?

I've searched but can't find any information about the memory card slot other than maximum capacity. Does anyone know if the S10 will finally support UHS-II memory cards?

skiddingus said:
I've searched but can't find any information about the memory card slot other than maximum capacity. Does anyone know if the S10 will finally support UHS-II memory cards?
Click to expand...
Click to collapse
I doubt it will support the faster speeds so it would only transfer at UHS-I speeds. I can see the advantage of Uhs-ii for professional photography with cameras but probably not as much for phones.

Tel864 said:
I doubt it will support the faster speeds so it would only transfer at UHS-I speeds. I can see the advantage of Uhs-ii for professional photography with cameras but probably not as much for phones.
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Click to collapse
No, no phone can handle that yet @ UHS-II speeds, btw they have deals on SanDisk Extreme at Amazon right now, I bought 128GB for $29, 400GB costs less then $110:

mzsquared said:
No, no phone can handle that yet @ UHS-II speeds, btw they have deals on SanDisk Extreme at Amazon right now, I bought 128GB for $29, 400GB costs less then $110:
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Can you give speed test results of that card on your S10:
https://play.google.com/store/apps/details?id=com.a1dev.sdbench

vasra said:
Can you give speed test results of that card on your S10:
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Click to collapse
I have S10e now, 128GB Sandisk Extreme:

mzsquared said:
I have S10e now, 128GB Sandisk Extreme:
Click to expand...
Click to collapse
Thanks, that's pretty fast.

Actually benchmarks have to be done with ATTO Disk Benchmark to test all file sizes not only sequential which we know it's the highest.