yashsingh1/xdaforums huggingface dataset:
[General Accessories] fuzzy_wuzzy1:
Very interesting! i liked it
[General Accessories] Evo4sickness:
Yo Psp Amazon and buy it from a place called Midwest memory they will have it.

So nobody else has any ideas on the incorrect calculation that reads the bits and gives you the total of 29.7 and not the 32 when in fact it is 32.
[General Accessories] Zisworg:
I bought a TransFlash MicroSD 32GB Mustang Highspeed Class 10. Pretty cheap, high performance : very satisfied!
[General Accessories] betovanbuuren:
Can you post a link when you bought it please¡¡
[General Accessories] dachness:
Just curious, where did you buy the Sandisk card from? Was it an authorized dealer? Sandisk SD cards are often counterfeits if not sold from an authorized dealer. If buying from amazon.com verify that the seller is amazon.com and not a third party vendor.

Daniel
[General Accessories] icincan:
I didn't buyed online. I buyed from a shop near my home, in Bucharest, with recipe and warranty. Unfortunately, I saw similar tests with same Sandisk class 10 32 Gb cards, right here on forum and also unfortunately no one who already buyed this card , did not post results here. Personally, I got used to my 32 Class 10 Samsung cards, even they are not performing the way that are supposed to perform.I will not buy another card until I will be able to check it first or until I saw few tests or few forum posts who will confirm good performances.
[General Accessories] projekt06:
I wonder if there are any nand benchmarks.
[General Accessories] DualJoe:
Nand: Samsung Galaxy S+ (CM9, 1.8GHz, performance governor)

Notes:

- conv=fsync to write out all caches/buffers.

- sync && echo 3 > /proc/sys/vm/drop_caches before read operations to clear caches/buffers.

Write (/data, ext4):

20M blocksize = busybox dd if=/dev/zero of=/data/bench.bin bs=20M count=5 conv=fsync

104857600 bytes (100.0MB) copied, 18.454956 seconds, 5.4MB/s

104857600 bytes (100.0MB) copied, 16.590332 seconds, 6.0MB/s

104857600 bytes (100.0MB) copied, 15.136688 seconds, 6.6MB/s

104857600 bytes (100.0MB) copied, 15.230988 seconds, 6.6MB/s

104857600 bytes (100.0MB) copied, 14.295746 seconds, 7.0MB/s

104857600 bytes (100.0MB) copied, 16.056213 seconds, 6.2MB/s

104857600 bytes (100.0MB) copied, 14.195710 seconds, 7.0MB/s

4k blocksize = busybox dd if=/dev/zero of=/data/bench.bin bs=4k count=25600 conv=fsync

104857600 bytes (100.0MB) copied, 509.976624 seconds, 200.8KB/s

104857600 bytes (100.0MB) copied, 571.303894 seconds, 179.2KB/s

104857600 bytes (100.0MB) copied, 577.159088 seconds, 177.4KB/s

104857600 bytes (100.0MB) copied, 579.475647 seconds, 176.7KB/s

104857600 bytes (100.0MB) copied, 538.587066 seconds, 190.1KB/s

Read (/data, ext4):

sync && echo 3 > /proc/sys/vm/drop_caches (clear cache)

20M blocksize = busybox dd if=/data/bench.bin of=/dev/null bs=20M

104857600 bytes (100.0MB) copied, 2.669159 seconds, 37.5MB/s

104857600 bytes (100.0MB) copied, 2.670685 seconds, 37.4MB/s

104857600 bytes (100.0MB) copied, 2.718353 seconds, 36.8MB/s

104857600 bytes (100.0MB) copied, 2.671478 seconds, 37.4MB/s

104857600 bytes (100.0MB) copied, 2.663757 seconds, 37.5MB/s

Write (/sdcard, fat32, same nand like above):

20M blocksize = busybox dd if=/dev/zero of=/sdcard/bench.bin bs=20M count=5 conv=fsync

104857600 bytes (100.0MB) copied, 19.886536 seconds, 5.0MB/s

104857600 bytes (100.0MB) copied, 22.331665 seconds, 4.5MB/s

104857600 bytes (100.0MB) copied, 20.990967 seconds, 4.8MB/s

4k blocksize = busybox dd if=/dev/zero of=/sdcard/bench.bin bs=4k count=25600 conv=fsync

104857600 bytes (100.0MB) copied, 320.818725 seconds, 319.2KB/s

104857600 bytes (100.0MB) copied, 321.708923 seconds, 318.3KB/s

104857600 bytes (100.0MB) copied, 325.138764 seconds, 314.9KB/s

Read (/sdcard, fat32):

sync && echo 3 > /proc/sys/vm/drop_caches (clear cache)

20M blocksize = busybox dd if=/sdcard/bench.bin of=/dev/null bs=20M

104857600 bytes (100.0MB) copied, 2.801544 seconds, 35.7MB/s

104857600 bytes (100.0MB) copied, 2.797699 seconds, 35.7MB/s

104857600 bytes (100.0MB) copied, 2.821594 seconds, 35.4MB/s

CrystalDiskMark on Phone/USB mounted sdcard and local AnTuTu:
[General Accessories] bernida:
hello community

just got my new 32GB SandDisk Ultra Class 10 microSDHC "Android-Version" (Link below)

IDK what the difference to their normal version is though.

but the test results are amazing so far:

(I am posting test results from both my internal Laptop SD reader (normal font), aswell as results from my external Hama USB 2.0 35in1 Card Reader (Link below) (red font))

(also, Card is formatted with SDformat tool, quick format)

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World :

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 20.088 MB/s

Sequential Write : 13.092 MB/s

Random Read 512KB : 20.207 MB/s

Random Write 512KB : 12.338 MB/s

Random Read 4KB (QD=1) : 3.750 MB/s [ 915.6 IOPS]

Random Write 4KB (QD=1) : 1.513 MB/s [ 369.3 IOPS]

Random Read 4KB (QD=32) : 3.705 MB/s [ 904.5 IOPS]

Random Write 4KB (QD=32) : 1.263 MB/s [ 308.3 IOPS]

Sequential Read : 19.782 MB/s

Sequential Write : 14.136 MB/s

Random Read 512KB : 19.760 MB/s

Random Write 512KB : 11.956 MB/s

Random Read 4KB (QD=1) : 4.206 MB/s [ 1026.8 IOPS]

Random Write 4KB (QD=1) : 1.744 MB/s [ 425.7 IOPS]

Random Read 4KB (QD=32) : 4.357 MB/s [ 1063.8 IOPS]

Random Write 4KB (QD=32) : 2.099 MB/s [ 512.5 IOPS]

Test : 50 MB [F: 0.0% (0.0/29.7 GB)] (x5)

Date : 2012/10/16 18:58:55

OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)

Unfortunately, as this is my 1st post, I cannot post links normally :(

h**p://ww w.hama.de/00055348/hama-35in1-usb-20-multicard-reader-blue

h**p://w ww.sandisk.com/products/memory-cards/microsd/ultra-class10-for-android/?capacity=32GB

regards
[General Accessories] DualJoe:
Thanks, quite good results indeed. Can you do this test on your smartphone as well (mount sdcard over usb)?
[General Accessories] bernida:
as I dont have my HTC HD2 yet (it will arrive this week), I am afraid I can't atm. But I will share the results too ASAP.

Is there a test app for android? Because I think test results are more accurate if tested via the phone itself, instead of testing via phone-mount (data has to pass phone-mount->card-reader->usb controller...) or correct me if I am wrong please...

regards
[General Accessories] DualJoe:
There are tools like Antutu bechmark indeed but since neither the usb controller nor cpu or anything else should be a bottleneck here i think its maybe better to remain at crystaldiskmark so we can somewhat compare results here. These comparisons are not too serious anyway. Just to get some kind of impression.
[General Accessories] DualJoe:
I've updated the dd benches providing some quickstart commands in case someone wants to share some dd results as well.
[General Accessories] icincan:
Real test

A 50 MB test is not relevant. Try at least 1000 MB and atach the print screen please. You should try transfer a folder with 1-2Gb of JPEGS and count the time. For me, those tests were relevant. Thx and enjoy your 32 Gb card!
[General Accessories] CatalystWon:
It should work - Lexar 32GB class 10 works for GT-I9000. Check your manual to be sure.
[General Accessories] mikhaew:
My card dont working
[General Accessories] gerickjohn:
I'm not sure I follow, is Patriot the best Class 10 card?
[General Accessories] Balcanian:
Guys can anyone answer me, What is imortant for playing music and videos( after transfering on the phone) Sequential or Random speed?
[General Accessories] DualJoe:
Sequential Speed...
[General Accessories] JohnnyGTR:
+1
[General Accessories] Balcanian:
So overall If We choose higher class card (6 or 10) just the loading time of an app will be longer due the random access. It won't affect after loading application like lagging?
[General Accessories] Bifurcator:
AFAIK from the (somewhat in-depth) research I've done on solid-state memory cards and drives "random access" tests are not telling you anything at all except that the software algorithms were not intended for SD storage devices. As memory mapping actually occurs on a SD device and through it's embedded controller Random Accesses are not possible at all. Every cell looks like a sequential and continuous cell across a file or files over the entire card. Multi-chip cards can have a slight delay when reading across chip boundaries but it's nominal and measured in single digit milliseconds at worst. So if I have that right - and I believe I do, we can all safely ignore Random Access results from all of these tests. Random Access tests are supposed to show seek and interleave speeds on a traditional HDD or FDD which have physical heads. There will never be a condition on your phone or when connected as a storage device to your computer (except for these benchmark testing apps) which will use your card in "random access".

All we care about is Read, Write, Data Sizes, and Cache features (on/off/size).

Anyway, here's the results from my $18 cheap-o AData 32GB Class(10) card as accessed by my Mac through the SD-05D Galaxy Note:

4KB test - written 50 times and repeated 50 times.

40KB test - written 100 times and repeated 10 times

1.5MB test - written 15 times and repeated 10 times

20MB test - written 5 times and repeated 3 times.
​

Mostly all that's important here are the "Averages" given.

I really like AData products. So far across multiple SD cards, MicroSD cards, and CF cards AData products are as fast or faster than the fastest SanDisk equivalent for between one fifth (1/5) and one tenth (1/10) the price! And ya can't beat that with a stick! :)

I'm a photographer (of sorts) too so I have lots and lots of various cards - although I think this is my first MicroSD AData card.
[General Accessories] bibizikaman:
only scandisk
[General Accessories] DualJoe:
The 4k tests don't look very reliable. You still have buffers there probably. On MLC with internal erase blocksize of 128KB you can never achieve 8MB/s.

And 4k tests are not useless at all. They show worst condition results, IOPS count under stress, minimum throughput.

Try dd of my post above.
[General Accessories] gojo.pl:
manyitt bob

The ultimate test would be an app for android to test the SD performance. Testing on PC is like testing entire enviroment (including card reader speed).
[General Accessories] Bifurcator:
Yeah, I think they probably show inefficiencies over/of the USB interface more than anything else. <shrug> It's testable but I don't have the time or inclination to do so myself.

I also agree with the guy saying that these tests should in best measure be executed in android on the phone itself. But at the same time I think the usefulness of such a test is limited in scope to the proprietors of those particular device and card combinations. At least until more phones are created more equal and capable than they currently are. So someone testing a high speed card on a weak device won't adversely affect our opinions and averages.

And I must add that I totally disagree with people who just advocate SanDisk for it's name's sake without giving any COMPARATIVE evidence! That's the very definition of "fanboyism" and is best ignored by reasonable people wishing to make intelligent decisions! :) Especially when the reality of the situation is that you can either pay near $100 for a SanDisk class(10) which specs at about 25MB/s or you can pay $15 to $20 for "another brand" class(10) card which which specs at, yup, 25MB/s. In my way of thinking I would rather have 5 or 6 of the $15 cards than just one SanDisk if I'm going to spend around $100 for MicroSD storage. They all have the same life-span after-all, it's not like SanDisk is any more reliable or longer lived. If they spec out at about the same speed that's the only consideration needed (these days). After that we're only left to consider price - and SanDisk always loses that one.
[General Accessories] davidwyl:
here are the result for SanDisk Ultra microSDXC UHS-I card clas 10 64GB.

format to fat32 using MiniTool Partition Wizard Home Edition.

and

test result in Galaxy Note 2 II N7100.
[General Accessories] Bifurcator:
I thought this thread was about 32GB cards? 64GB cards will always be faster than 32 all other things being equal.
[General Accessories] DualJoe:
They are not faster at all (in the same MB/$ class). It's just that people with SDXC cards will probably have an SDXC/UHS reader as well that will support up to 104MB/s (bus speed). The old SDHC bus is 4bit 50MHz SDR. When you see benchmarks with 30MB/s the interface is at its limit for sure. Even that is achieved with controller tricks only I guess. Normal SDHC interface throughput should be around 22-25MB/s.

When you see benchmarks with 40MB/s+ they are most likely using an SDXC reader. SanDisk supports UHS on their latest SDHC cards as well. That's probably also the reason why some people skyrocket with that cards. Older cards may not support that.

Flash memory cells are way faster than 30MB/s these days. It's nearly always just the old SD interface that's capping here.
[General Accessories] icincan:
Actually, 32Gb cards will always be faster than 64Gb with same specs and 16 Gb will be even more faster. Seems like your card perform pretty well. I also have an 16Gb AData class 10. But you said that you are photographer. You are suppose to transfer your pictures from and to cards ( or between ). I guess time is important for you. So is important to transfer 1Gb-32 Gb pictures faster not 50 Mb. We are not talking about 50-100 MB tests. Almost all folks here posted 50 MB tests that are not relevant. I started those tests only when in "real life" I remarked how long it took me to transfer pictures to and from my new 32 Gb class 10 UHS1 Sandisk , comparing with my "old" 32 Gb class 10 Samsung. Maybe that Sandisk card was defective but the seller told me that will not refund another one so I gave up an buyed another Samsung that was also cheaper as your AData. I remarked that 512k writing speed is relevant for real life transfering large amounts of pictures ( ex 1-2 Gb of multiple Jpegs, not large Videos) I explained that on post #579. For large Videos seems like is relevant Seq writing speed.

So if anyone make tests, please make it 1Gb or more in order to be relevant.
[General Accessories] DualJoe:
Why do you believe in that?
[General Accessories] realsis:
Just got a San disk 64 micro for my device. Class 10. Ran a check on it and speeds are as they should be and read write is as it should be. San disk had never disappointed me yet but there are a lot of fakes going around so I thought id check. It's working perfectly one I formatted in recovery. Had to get to recovery through battery pull because going through my 4extra app kept giving me failure saying SD card must be installed and the SD was reconised first as a defective card so once i formatted through recovery through battery pull I formatted and now it worked perfectly! Usually San disk won't disappoint.

Sent from HTC sensation, soff, 3.33 firmware, viper Rom, sense 4.1,kernel- faux 10b6 , Mugen 3800 mah battery. Please press thanks if I helped in anyway. :)
[General Accessories] icincan:
Because of the space and architecture. If you will check the Sandisk Extreme Pro series you will see that there is no 64 Gb nor 32Gb cards. Only 8 and 16 Gb. More density means lower speeds.

---------- Post added at 01:23 AM ---------- Previous post was at 12:54 AM ----------

Really! And how they should be? See post o#608 from davidwyl and check 512k speeds for the same Sandisk 64Gb card as yours. Is the same disappointing speed as in my tests with 32Gb Sandisk class10 UHS1. Because davidwyl made a 500 MB test wich is more reliable and accurate then 50 MB. That I was talking about in my ffew past posts. 512k test seems to be similar and representative for transfering an amount of data consisting in many smaller files. So when you will transfer pictures, you will have to wait double or triple time. If you are happy with that, that is ok!. For me wasn't like that. I'm not satisfied only with Brand. I was expecting performance, once I paid 30% higer price than any other brand, at least the specs that they claim.
[General Accessories] DualJoe:
If "density" would be a speed factor 4GB or lower would skyrocket in benchmarks. There is probably just no demand for these cards in that class.
[General Accessories] CatalystWon:
Warning about Sandisk Ultra 32GB UHS-1 running hot

There are claims on Amazon that the SanDisk Ultra 32 GB microSDHC Class 10 UHS-1 Memory Card with Adapter SDSDQUA-032G-U46A may run hot on formatting and writing. Just mention to SanDisk support that it is running hot and it should be RMA'd.
[General Accessories] bernida:
please explain... I full overwrote formatted mine and it didnt produce any errors or such... It it physically destroying itself or what??
[General Accessories] DualJoe:
There was a large warning box some weeks ago on the amazon sandisk page that they are investigating some problems. They probably had several badges of fakes there.
[General Accessories] bernida:
okay, so nothing to worry about with mine as everything is working well I guess (and fake cards wont have the good read/write speeds aswell)
[General Accessories] Boatiy:
What do u guys think of this,

http://www.newegg.com/Product/Product.aspx?Item=9SIA1EK0CJ5483

I might pick it up
[General Accessories] SinAkira:
I bought this days a Samsung 16Gb MicroSD class 10 Plus.... when i get it i'll tell you my opinion.... this guide is so helpfull :D thanks ;)
[General Accessories] rammy121:
did it work..??

did it work, i just broke the blister pack on mine...then read all of the horror stories...i'm just going through the motions of somehow if pos. cloning the old 16gb and putting it on the 32gb...and let's see. . .
[General Accessories] DualJoe:
Just give it an initial full format (5min) to write all cells once (followed by an official sdformatter quickformat). If the card "survives" and is in proper speed range you should be good to go. If not, just RMA it and get a new one.
[General Accessories] xdracco:
Thanks for this very informative post. I just just bought a class 10 patriot and am having all kinds of write issues. Since I bought this card mostly for the SD adapter, I took out the class 10, popped in the original microsd (class 4) and low and behold... all writing issues are GONE. Just one fat32 reformat and i had no muss, no fuss with writing.

Sigh, now it's back to Fry's to replace or refund. I suppose I'll be consulting these forums before making any future purchases.
[General Accessories] carnosus:
Sandisk

im about to buy this one:

urun.gittigidiyor.com/cep-telefonu-pda/sandisk-ultra-32gb-microsd-class-10-hafiza-karti-67920431(sorry for turkish page)

amazon.com/SanDisk-Mobile-MicroSDHC-Version-Komputerbay/dp/B008H5QEI2/ref=sr_1_9?ie=UTF8&qid=1352575699&sr=8-9&keywords=sandisk+32+gb+micro+sd+30mb+android

(cant post with url because i need more post!)

i think this link on amazon same for same item.

anyway anyone using this card and suggest buy ?

ill use it on LG p725 optimus 3d max.
[General Accessories] goodsinchina:
i use sas read speed 100MB/S
[General Accessories] ChinchilaO:
Sandisk UHS1 Class 10 SDSDQUA-032G-U46A

Bought on dealextreme

bad results:

https://docs.google.com/open?id=0Bwr7L10dHRyhcE5XYk9fOHk5RXM

Is there any chances for my cardheader making it slower?
[General Accessories] DualJoe:
I've bought the same card and it's incompatible to my I9001. It freezes the phone and even led to corrupted /system and /data partitions once. The card works properly in windows and a different phone though. Weird... guess i will get the Samsung 32GB now.
[General Accessories] koniakki:
My 2 Samsung 32GB Class 10 Essentials(blue/black) cards arrived from Amazon UK.

Thoroughly benchmarked and h2testw 1.4 tested. At first one of the 2 froze at 1.87GB when copied my stuff from my previous card

and I was "OH COMEEEE ON!! FML!! I got a fricking fake one??(we all hate it when it happens even if its somehow "common" now to get fakes)"!

But I wasn't expecting to get fake when purchasing directly from Amazon. And after couple hours of researching, reading almost all damn topics

on cluster size, fat vs ntfs, fakes vs real one, best ways to check them etc(had to refresh my info on the mentioned subjects),

reading feedbacks etc I came to the final conclusion that THANKFULLY the cards are NOT fakes.

Avg results with CrystalDisk are 22,5MB/12MB, 22MB/12MB, 6,7MB/1,28MB, 6.7MB/1.28MB @FAT32 32KB cluster.

I was holding for a year on my GNote with a 8GB. Run out of space many times.. Well those problems are over. Thank you Sammy.
[General Accessories] lcoroas:
someone already tested uhs I cards, I am thinking of buying samsung 32 g card UHS I,
[General Accessories] jakalman:
bought from mymemory

does these speeds look about normal for this type and class of card ?

it's a sandisk ultra 32GB MicroSDHC I, UHS speed class 1, CLASS 10 i did wonder why the one i received from them doesnt have "mobile" in it's name though hmm ?

like this one which is what i ordered SanDisk 32GB Mobile Ultra Micro SD (SDHC) Card - Class 10 UHS-1 + SD Adapter
[General Accessories] DualJoe:
Write speed is good. Sequential read is kinda medium/low (should be ~20MB/s on non-uhs controller) but this probably comes from your reader or something else.

If the card is new you might want to use sdformatter erase/overwrite once completely (takes 50min) to trigger/write every cell at least once. Test it thoroughly in your target device as well. I had the same card and it worked properly everywhere but not in the device it was intended for.
[General Accessories] Native7i:
I've been sticked to class 4 ever since. This tests done on Infuse 4G with Imation 16gb (SA16G).

I never haven't pc my own and I haven't done cristal disk mark test. Sorry for that.

Second test got while playing 96kbps mp3 file.
[General Accessories] lcoroas:
I'll buy samsung UHS I:good::good:
[General Accessories] bluviper:
so upon reading all about classes on page 1...

is class 4 cards still the recommended card for smartphones?

or class 10 will perform better on dual core smart phones?
[General Accessories] Funky Games:
I'd go for class 10, the price difference is not that big but you can use it also in other devices using the adapter. Then the class makes difference.
[General Accessories] macpro88:
I would say buy both a class 10 and 4, cause you never really know, and the prices are right, I have a Class 10 32GB in my RAZR HD right now and so far no issues, possibly because its a new phone, not quite sure what the correlation really is yet with some class 10 not working.

I would however, depending on your phone, stear clear of the 64gb cards for now, I've been doing a little trial and error stuff myself with the 64gb card here: http://www.droidforums.net/forum/dr...d-cards-hd-maxx-hd-class-10-32gb-vs-64gb.html
[General Accessories] tonemgub1:
Sandisk Class 4 vs. Samsung Class 10

Hello XDA Community, I hope you could help me to choose between a Sandisk Class 4 and Samsung Class 10 32 GB microSDHC Card.

The card will be used in Samsung Galaxy Gio as external app partition and for taking and storing pictures and listening to music (transfering form pc).

Comparing CDM benchmarks of the two cards in a data sheet (cant post links, see attachments) I coud find out these differences:

Sequential Read: both 20-24mb/s

Sequential Write: Sandisk: 4.5mb/s-6.5mb/s - Samsung: 12.5mb/s (2-3x faster)

Random Read 4KB (QD32): Sandisk: 2mb/s-3.5mb/s (1x7.4mb/s) - Samsung: 4.7mb/s-7.5mb/s (~2x faster)

Random Write 4KB (QD32): Sandisk: nearly 1.7mb/s (SDSDQM-032G-B35A relevant model) - Samsung: nearly 1.4mb/s (0.8x slower)

Price: Sandisk: 17€ (Amazon Trader) 25€ (Shop) - Samsung: 26€ (Amazon Trader) 28€ (Shop)

I attached screenshots of the important entries, sorted by different columns.

Although Samsung is more expensive I think it would be worth it because of transfering stuff from pc. But I really dont know how important the Random write speed is and also I already read that in general Class 4 Cards are better for apps, is this true in this case?

Thx for help!