yashsingh1/xdaforums huggingface dataset:
[General Accessories] Techvir:
Pretty much any card can be used to do the job.

Again top brands like sandisk, lexar, kingston, etc are very reliable cards, and very rare reports that they fail.

Higher the class,the lower it gets with random speeds and may be , lower performance when used in cell phones.

Hence the reccomendation to use class4 cards for large size cards like 32gb.

This might change in future when they find ways to improve the random speeds.

On the other higher class cards are good for normal data transfer like bunch of music or movies from the pc to card or vice verssa
[General Accessories] Gi3M0:
That's great performance.:eek:
[General Accessories] LuffyPSP:
kingmax brand any good? i have 8GB kingmax class 10 and sandisk 16GB class 2.

which one better to be put inside SGS2?
[General Accessories] cajunflavoredbob:
Class 10 is better for transferring data or for users who shoot a lot of high res video and pictures. Class 4 or 2 is better for general use where you have a ton of apps and data cached on the SD card. So, really, if you don't shoot much video or photos, you'll never really have a problem with the Class 2 card. I would define a lot of video/photos as more than 1 video or 10 pictures a day. Basically where you replace you camera with your phone kind of situation. Most users should stick with lower class cards since they don't fall into that category.
[General Accessories] LuffyPSP:
great answer just like i need. Thanks brother!
[General Accessories] Warlord_Link:
Is Kingmax good? my friend use kingmax 8 gb class 10, he said it is slow write speed than transcend class 6 .
[General Accessories] LuffyPSP:
dont buy kingmax. haha even though i use it. its the same speed as my class 2 sandisk. i just dont have money right now to get other brand. i just bought my sgs2 today! yay for me btw!
[General Accessories] DarkPrinceByWWW:
Hey guys, which file system is used for the cards (fat32?) and which blocksize?
[General Accessories] zarathustrax:
That was me you quoted on the first post, OP. How did you copy/paste one of my posts without being able to see the poster's name?
[General Accessories] cajunflavoredbob:
You can simply stick [ QUOTE] [/ QUOTE] tags around any block of text to get that effect. You could also do [ INDENT] [/INDENT] tags to get the same look.
[General Accessories] drjamit:
No stuttering in FULL HD VIDEOS

I shot Full HD 1080p from my sgs2 and keeping card as the memory option. Cool Video, No stuttering , i must say. So 1700 rs transcend 32 gb class 4 is good VFM in my opinion. I have recieved Sandisk 32gb class 4 too but i m not opening the package as i feel it is costly( 350 rs difference between transcend and sandisk). I have mailed letsbuy.com about my intentions to return the card. although it looks tempting to open and check that too.
[General Accessories] acetkbez:
samsung class 10

I just got a samsung class 10 for $30. It works really well compared to the stock 32gb micro sd card that I got from a cell phone awhile back (probably a class 2 or class 4 although I will have to run a check on it).
[General Accessories] patriot720:
Could you post a link for that card please?
[General Accessories] itsmyname:
Is a Class 4 Sandisk 16gb MicroSD card good enough for me?

I'm going to put it into my Arc S. All my music will be on there, as well as movies and a few files maybe
[General Accessories] onetonnoodle:
hi guys! here's a speed test of my SanDisk class 4 32GB, just for additional reference. :)

by the way, I formatted my microSD first using the formatter linked by cajun. The setup I used was microSD mounted to a "microSD to SD adapter" then mounted to an "SD to USB adapter" then to a USB port on my PC before doing speed tests. So I think the results could be a little better or more accurate if I have a more direct connection between my microSD and PC, too bad I don't have that. anyway hth :)
[General Accessories] s9pa:
IT would make sense that the Class 10 would be faster, under the same testing conditions and if the SD-Card is the bottleneck of your system (speedwise), as class 10 can be read with speed up to 10MB/s, compared to just 4MB/s for class 4.

There is a good documentation on this here
[General Accessories] TravelHead:
Transcend 32GB Class 4

Added for Reference.

Transcend 32GB Class 4

Purchased March 2012

Cost £14.99

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

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

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

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

Sequential Read : 20.620 MB/s

Sequential Write : 4.540 MB/s

Random Read 512KB : 19.391 MB/s

Random Write 512KB : 0.535 MB/s

Random Read 4KB (QD=1) : 2.484 MB/s [ 606.4 IOPS]

Random Write 4KB (QD=1) : 1.228 MB/s [ 299.8 IOPS]

Random Read 4KB (QD=32) : 2.231 MB/s [ 544.7 IOPS]

Random Write 4KB (QD=32) : 1.239 MB/s [ 302.4 IOPS]

Test : 1000 MB [F: 0.0% (0.0/29.7 GB)] (x5)
[General Accessories] onetonnoodle:
I saw this from another thread, his class 6 microSD performs better than my class 4 in almost every aspect.
[General Accessories] dazza9075:
If it's red and gray its a class 6, the black version is class 4
[General Accessories] onetonnoodle:
i'm aware of that. But what's bothering me is because I thought lower classed cards are generally better in random speeds aspect than their higher classed counter-parts.
[General Accessories] cajunflavoredbob:
It isn't really fair to compare SDXC cards to SDHC. Two different formats. SDXC have better stats overall than SDHC.
[General Accessories] onetonnoodle:
I see, thanks for that info bro. :)

I'm so intrigued now, I want to sell my class 4 for this sdxc cards just to see its performance myself. xD
[General Accessories] Digital Pandemic:
Can anyone let me know if its possible/difficult to to move installed apps from an SD card over to a new one if I upgrade the size? Is it just a case of copy/paste?

Cheers
[General Accessories] cajunflavoredbob:
Copy and paste if it's a FAT32 partition. If you've got an EXT partition, you're going to loose any data on that.
[General Accessories] vinceyeung:
Samsung MB-MSBGAEU 32GB Class 10 Micro SD Card

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

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 : 19.930 MB/s

Sequential Write : 11.786 MB/s

Random Read 512KB : 19.578 MB/s

Random Write 512KB : 10.845 MB/s

Random Read 4KB (QD=1) : 3.736 MB/s [ 912.2 IOPS]

Random Write 4KB (QD=1) : 0.693 MB/s [ 169.2 IOPS]

Random Read 4KB (QD=32) : 3.833 MB/s [ 935.7 IOPS]

Random Write 4KB (QD=32) : 0.683 MB/s [ 166.7 IOPS]

Test : 1000 MB [R: 0.0% (0.0/29.2 GB)] (x5)

Date : 2012/03/13 19:37:19

OS : Windows Vista Home Premium Edition SP2 [6.0 Build 6002] (x86)
[General Accessories] cajunflavoredbob:
From now on, everyone needs to make sure to post whether the card is SDHC or SDXC. There is a BIG difference between the two.
[General Accessories] vinceyeung:
Kingmax microSDHC 16GB class 6

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

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 : 18.520 MB/s

Sequential Write : 17.042 MB/s

Random Read 512KB : 0.000 MB/s

Random Write 512KB : 0.000 MB/s

Random Read 4KB (QD=1) : 3.552 MB/s [ 867.1 IOPS]

Random Write 4KB (QD=1) : 0.006 MB/s [ 1.4 IOPS]

Random Read 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]

Random Write 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]

Test : 50 MB [I: 0.0% (0.0/14.7 GB)] (x5)

Date : 2012/03/13 21:45:46

OS : Windows Vista Home Premium Edition SP2 [6.0 Build 6002] (x86)

N.B.: i didnt do 512k and 4k QD32 tests
[General Accessories] onetonnoodle:
could you enlighten us what the difference is between the two? or probably which is better?
[General Accessories] cajunflavoredbob:
SDXC is the newer, faster format that supports the new 64GB cards. It will say which format it is on the package. Right now there asre 32GB and 64GB SDXC cards, I believe.
[General Accessories] oxman504:
I can't find any in a micro. Got a link? never mind. Found out that sdxd is for 64gb and up not the 32gb.
[General Accessories] cajunflavoredbob:
Pretec made them as low as 8GB at one point. The maximum is 2TB for SDXC. 32GB SDXC is uncommon, but it's like finding 2GB SDHC. They are there, just not in high production. Basically, the bottom of the line cards in SDXC are class 16 right now. It's a whole other level than regular SD or SDHC.
[General Accessories] oxman504:
-----------------------------------------------------------------------

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 : 16.154 MB/s

Sequential Write : 10.533 MB/s

Random Read 512KB : 23.436 MB/s

Random Write 512KB : 12.452 MB/s

Random Read 4KB (QD=1) : 5.077 MB/s [ 1239.5 IOPS]

Random Write 4KB (QD=1) : 4.690 MB/s [ 1144.9 IOPS]

Random Read 4KB (QD=32) : 7.873 MB/s [ 1922.2 IOPS]

Random Write 4KB (QD=32) : 2.499 MB/s [ 610.1 IOPS]

Test : 50 MB [E: 0.0% (0.0/29.2 GB)] (x5)

Date : 2012/03/18 7:06:48

OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)

Samsung 32GB Class 10 NOB

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

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 : 17.326 MB/s

Sequential Write : 10.272 MB/s

Random Read 512KB : 10.029 MB/s

Random Write 512KB : 12.248 MB/s

Random Read 4KB (QD=1) : 2.678 MB/s [ 653.7 IOPS]

Random Write 4KB (QD=1) : 4.718 MB/s [ 1151.8 IOPS]

Random Read 4KB (QD=32) : 1.836 MB/s [ 448.3 IOPS]

Random Write 4KB (QD=32) : 2.812 MB/s [ 686.4 IOPS]

Test : 100 MB [E: 0.0% (0.0/29.2 GB)] (x5)

Date : 2012/03/18 7:23:13

OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)

Samsung 32GB Class 10 NOB

I did 2 test 50mb and 100mb.

---------- Post added at 07:59 AM ---------- Previous post was at 07:28 AM ----------

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

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 : 17.527 MB/s

Sequential Write : 9.289 MB/s

Random Read 512KB : 5.468 MB/s

Random Write 512KB : 9.524 MB/s

Random Read 4KB (QD=1) : 2.181 MB/s [ 532.4 IOPS]

Random Write 4KB (QD=1) : 1.021 MB/s [ 249.2 IOPS]

Random Read 4KB (QD=32) : 2.948 MB/s [ 719.7 IOPS]

Random Write 4KB (QD=32) : 1.020 MB/s [ 249.0 IOPS]

Test : 1000 MB [E: 0.0% (0.0/29.2 GB)] (x5)

Date : 2012/03/18 7:57:12

OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)

Samsung 32GB Class 10 NOB

Here's a 1000mb if it makes any difference. I did notice seq write went down. All test were done with sd card in the phone hooked to the computer via usb.
[General Accessories] dtor:
Here are some tests I ran on my new Sandisk Ultra Mobile 32 Class 6 GB MircoSD card ( SDSDQY-032G-U46), using three different formatting methods and two different file size (all with 5 repetitions). All tests were performed on my 3 year old Dell Studio 1737 w/ a blazing fast Intel Pentium Dual Core @ 2.00 GHz, 4 GB RAM, Windows 7 64-bit, and a custom monitor lid. :p I used the built-in SD Card reader and the Sandisk-supplied microSD card adapter.

I also tested my Patriot 16 GB Class 10 card for comparison. I hope this info helps somebody.

As far as real-world file transfer goes, I am currently moving about 15 GB of data from my backup of the contents on my old 16 GB card to my new Sandisk 32 GB card. The file transfer rate has been hovering around 5.5 MB/Sec. I am transferring the files through the built-in card reader - as opposed to using tethering my phone to my computer via USB. I started out with the USB file transfer method, and the transfer rate had settled down around 4 MB/Sec.
[General Accessories] D-SHEL:
So, what class of microSDHC cards would be better for using in HTC Sensation?

Class 4 or class 10?

I want to buy

this: http://www.ulmart.ru/goods/267143/

or this http://www.ulmart.ru/goods/240702/

or this http://www.ulmart.ru/goods/228824/

or this http://www.ulmart.ru/goods/223462/
[General Accessories] laiq:
Sandisk cards are awesome. Perfect 4 me!
[General Accessories] DrAgKurt:
[Request for Benchmark] SanDisk 32GB Class4 and Samsung 32GB Class10

I would like to thank you guys for bringing up your opinions on this thread. This post helped me choosing the right brand of MicroSD that I'm planning to use on my phone. So I decided to buy either SanDisk 32GB Class 4 or Samsung 32GB Class 10. Upon checking this thread, I noticed only Samsung Class10 can match or even surpass somehow the SanDisk Class 4 when it comes to random R/W. I need good random R/W as it's perfect for smartphones.

Now, if someone with a good heart could possibly post a Benchmark of these two using CrystalDiskMark (the copy/paste result) using x3/50MB and following these conditions:

1. Formatted/Clean - first test

2. Used/Installed apps - second test

3. via USB cable

Thank you in advance... :)
[General Accessories] hany0u:
which model?
[General Accessories] DrAgKurt:
Samsung 32GB Class10 and SanDisk 32GB Class4.

model? if you're pertaining with cellphone model, it doesn't matter. :)
[General Accessories] bconover93:
... ... ...
[General Accessories] cajunflavoredbob:
So we shouldn't buy from eBay because you might have made a mistake?

If it was a fake card, then file a report with PayPal.
[General Accessories] Zaim2012:
Based on this thread I purchased a 32GB sandisk Microsd card for my Sensation XE. The write speeds are very poor imo, Im getting 3mb/s if that. The 16GB Sandisk card that comes with the phone gave me around 6mb/s on avg (write speed)

Edit: i'm returning this and going for a sandisk ultra card.
[General Accessories] Zaim2012:
Really Happy I bought the 32GB Sandisk Ultra, well worth the extra IMO.
[General Accessories] harmonikas996:
Best choise is	карта памяти TransFlash 32Gb MicroSDHC Class 4 Transcend i have transcend SD card but 8GB, and i love it!
[General Accessories] faria:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (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 : 9.075 MB/s
Sequential Write : 8.085 MB/s
Random Read 512KB : 20.453 MB/s
Random Write 512KB : 8.454 MB/s
Random Read 4KB (QD=1) : 4.366 MB/s [ 1065.8 IOPS]
Random Write 4KB (QD=1) : 1.263 MB/s [ 308.4 IOPS]
Random Read 4KB (QD=32) : 4.848 MB/s [ 1183.6 IOPS]
Random Write 4KB (QD=32) : 1.259 MB/s [ 307.5 IOPS]

Test : 50 MB [T: 33.5% (9.8/29.2 GB)] (x5)
Date : 2012/03/27 1:05:28
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)

Here are the test for the new samsung 32gb class10 card, but the test was perfomed with the card half full of data in a samsung galaxy s, i will format it later and post more results.

It also must be stressed that this tests are somewhat inaccurate, as different card readers offer different read/write speeds!

for example, one of my card readers reports 1mb read/write speeds with the above card!

The only way to truly compare cards would be to test them all in the same pc/card reader.

Here is the same card tested on a EEE-pc

As you can see results ate wildly different.
[General Accessories] cognus:
i guess this is as much a vendor question as Mftr/part...

is this the right choice, via amazon?

claimed to be a sandisk class 4 [the 4 with a circle around it] 32gb:

http://www.amazon.com/SanDisk-micro...7?s=electronics&ie=UTF8&qid=1332885337&sr=1-7

if it matters, its going in a sammy galaxy s 4g

thx
[General Accessories] cajunflavoredbob:
There's an SD card sale going on at 1 Sale a Day right now. Just thought I'd let you guys following this thread know about it.

SD card sale! 2GB - 64GB $3 - $70
[General Accessories] j sta:
Bad I didn't get to read this before. Awiting delivery of some cheap BUT CLASS 10! sd.

Well, for a tenner, can always stick it into Wii.

Will be sure to test it when I get it though. Thanhs fot the usefull info.
[General Accessories] ramchip911:
Ditto

I agree :)
[General Accessories] Arismfg:
hello all! I hope you still use this thread

i bought a 32gb microsd (class 10) Patriot signature LX Series

i have tested on Samsung Ace and my results on first pic

i dont really trust those as other sd card benchmark for android showed me 10mb/sec write so it said its really class 10.

So on second pic my benchmarks on my PC. I used the same settings as on Lexar 32gb class 10 on first post (so to have comparable results)

Are those good results? By the way bought it for 32.50 USD! :)
[General Accessories] onetonnoodle:
the random speeds are abysmal bro.
[General Accessories] Arismfg:
what about my pc benchmark? is it good?
[General Accessories] cajunflavoredbob:
Higher class cards have high sequential speeds, but extremely low random speeds. Random speeds are better for application performance. For more information, please scan through the thread.

It's personal preference as to whether you want high sequential speeds (higher class) or higher random speeds (lower class).
[General Accessories] suku_patel_22:
Transcend 32 GB Class 10
[General Accessories] Arismfg:
so any class 10 is not good for android devices?
[General Accessories] cajunflavoredbob:
That's up to you. I can't tell you how you use your device. You have to decide which one you need more.
[General Accessories] slicer91:
Wish I saw this thread before, really helpful for those who are buying MicroSDHCs.
[General Accessories] Arismfg:
Ok i ve re-run the test for the Patriot 32GB CLASS 10 this time from my card reader instead of the usb adapter.

Here are my results

Did the test also for my Sandisk 8GB Class 4.

I dont see a huge difference with this class 4 regarding low write speeds on 4K

i could say its more like deciding if you want higher 4K read speeds or higher 4K write speeds. Patriot 4K write sucks but read is good and better than Sandisk class 4.

Can somebody tell me the difference between 4K and 4K QD32?
[General Accessories] cajunflavoredbob:
4K are the random speeds.

Also, you should have formatted the Class 4 before testing. Test results are not accurate when the card is loaded like yours is.
[General Accessories] phoneyericsson:
Hi all,

what's it like when you stick one of those cards in your Android full of music? I have an iPod Classic 160GB and now I'd like a bigger screen and touch for easier use. But I've heard terrible things about these SD cards in Android phones. I don't care about screenshots with big numbers,

-what is it like in practical use?

-Does music transfer quickly?

-When you de-tach your phone does it freeze while the SD loads? (some crappy mp3 players do).

-What happens when you load your music player, does it freeze, does it freeze the first time after music transfer or ever time, how long does it freeze?

-Do you have to format your SD card because of normal phone use? How often?

-How do you find out how fast your phone can read the SD?

That's all I care about. I have a feeling the only way I'll find out is by spending a lot of money, getting angry and buying another iPod. The Touch is waaaaay too expensive in my view, I'm not paying for Apple's champaign parties with my money. 32-64GB is expensive, it's the 8GB people who get cheap devices not us audio lovers.
[General Accessories] cajunflavoredbob:
The big numbers are the only things relevant to this thread.

Use of what? An SD card? They aren't much different than my iPod. They just holds less music. Use of them is dependent on the device you use it with.

This isn't really up to the card unless you take it out of the device to transfer content. It's really up to your PC's ability to keep up in that case. Again, not much different than transferring music to my iPod.

This is dependent on the device you are using, not the card. I've never heard of this except in the crappy MP3 Players. It's always best to eject the device first, however it shouldn't freeze anything.

Again, this has nothing to do with the card, but with the device you are looking to get.

Yet again, this is up to the device you use on how crappy it constructs a file system. Nothing to do with the card at all.

Do the test we've been doing but with the card mounted in the device. There are also some SD benchmark apps in the Android Market.

Only one of your questions is dependent on the SD card. All of the other ones depend on the device you use for performance. Your brain isn't much good on its own anymore than the SD card is without a device to use it in.
[General Accessories] slvrhwk:
Just received my 32GB Sandisk Class 4 card from Amazon. Here are the results. What do you guys think?

​
[General Accessories] dungm:
May I have a question, which class of SDCard that suitable for my SGS2 for multimedia purpose, i.e. HD movie...?

Your advise is appreaciated
[General Accessories] cajunflavoredbob:
Get which ever card allows you to search a thread before asking a question that's been answered several times before.
[General Accessories] phoneyericsson:
Hi, there are at least two considerations I believe. The first, regarding SD class for a HD movie, I found a few useful threads including this one:

http://xdaforums.com/showthread.php?t=1384247

Here, a number of people who've tested various classes say higher classes such as class 10 has poor performance in some ways and that class 4 actually performed better. I would also ask this question in the section for each phone, there will definitely be people who've bought cards that can tell you about their experience.

The second consideration is that each phone has specific SD card read speeds. This information I'm finding hard to find. Again, the SGS2 thread may have someone who knows. I've been doing the same with my own phone. The SGS2 is clearly a high-performance phone so I doubt you'll be disappointed but it's worth finding out anyway!

Basically, having a great SD but poor phone read speed or vice versa negatively affects the other.

Good luck! :)
[General Accessories] The Nexus Project:
Sandisk Hands down

Sent from my i9250 [GSM) Galaxy Nexus
[General Accessories] phonemobi:
6 microsd cards.

Tested on a netbook's Realtek PCIE Cardreader, using Kingston SDCARD adaptor.

Strangely, the 8GB Transcend Class 6 is faster than both the 8GB/16GB Transcend Class 10.
[General Accessories] davidwyl:
here is the result for my Sandisk Class4 32GB.....

*decided to move from Patriot Class10 16GB to Sandisk Class4 32GB due to the 4k & 4kQD32 write result.
[General Accessories] Chris4evernoob:
Here are my results for my Gigastone 32gig class 4 . Tested directly though micro sd port.