yashsingh1/xdaforums huggingface dataset:
[T-Mobile Samsung Galaxy S II SGH-T989] zookdagook:
Sandisk ultra micro SDHC class 6 i believe.
[T-Mobile Samsung Galaxy S II SGH-T989] adrscu:
Write: 4.3

Read: 6.5

Kingmax 4gb Class 6 MicroSD
[T-Mobile Samsung Galaxy S II SGH-T989] seriousfish:
Sad speed for class 10 card

Hi, I bought a SanDisk 64gb class 10 ultra uhs-1 microsd card but Im getting a class 4 read/write speed.

It was a mere 11mbps read and 8mbps write

I tried formatting to fat32 but to no avail.. prior to the format I noticed that my card have another unused 16mb logical partition. What format should it be in? Tried the guide using windows no-LBA format but failed due to it being 64gb, searched around the web but still, can't find a real solution.

Bought the card off of Harvey Norman Malaysia for 78usd. Haven't really tried h2wtest but it seems the 64gb space is legit, since I copied over 32gb of files and all of them are readable..in desperate need of pointers. Cheers.
[T-Mobile Samsung Galaxy S II SGH-T989] Kid Poker:
1) Kingston 16GB Class 2

2) Don't remember price, but it was over at newegg a couple years ago

3) Does what it needs to be done, always trusted Kingston
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
that's pretty decent for a card that is rated class 2, you are actually getting class 6 performance there
[T-Mobile Samsung Galaxy S II SGH-T989] Kid Poker:
I read what you said above and was shocked to even see triple the speed. I always relied on Kingston for some reason.
[T-Mobile Samsung Galaxy S II SGH-T989] Docmjldds:
Some of my tests did post a 10.1 write. Doubt I would see or feel much difference between 9.9, 9.2 or 10.1 for that matter. I know I consistently see 10Mb/s+ transfers when watching ROM transfers from PC to the phone. Not going to quibble much over the issue of whether it is performing at minimal spec. AFAIK, this was the first card that was 32Gb class 10. So possibly being the first out the gate with this card possibly places it below others in the same size and class. I only care that Patriot gave me no problems when I called them up, stated that the card could not be formatted. They processed the RMA right then and there and I had my new card in a couple of days. Customer SVC is also a point to consider.
[T-Mobile Samsung Galaxy S II SGH-T989] Mitallust:
Adata Class 10 32gb
[T-Mobile Samsung Galaxy S II SGH-T989] alleyezondisromo:
i feel like a retard for buying the new samsung class 10 32gb card... i really thought they were gonna be amazing but im barely pulling 9.2 mb/s write and 22 mb/s read which the read im not too mad about ... but i was suppose to be getting at least 12 mb/s write !!!:( F@*k you Samsung lol
[T-Mobile Samsung Galaxy S II SGH-T989] Strapt:
Well that's why we got this going :) .. I see there are a couple of ADATA 32GB class 10 here and so far both show great speeds ... Consistent so far .. Unless anyone else posts something different.

I'm glad you posted this about yours .. The first reply to my OP was about that card and it had the same results. So this is what i'm looking for more of the same cards to prove or disprove consistency .. So thank you ... And everyone else for posting!
[T-Mobile Samsung Galaxy S II SGH-T989] Docmjldds:
Seems my Patriot card falls into the same as Samsung although it does eak out 10MB/s currently with Juggernaut 2.0 and this kernel from Synergy:

http://www.multiupload.com/PS6XHI6TC8

Synergy-Kernel-v0.05.3-2.6.35.11-ck3+-OC1.8-UV-BFQ-LAGFREE-Autogroup.zip (10.18 MB)
[T-Mobile Samsung Galaxy S II SGH-T989] iammodo:
I think this should be in general > accessories as it would help the whole of XDA

I don't own a GS2 but thought I would reply anyway.

1) Samsung 16GB Class 10 Micro SDHC Extreme Speed Card

2) £25 www.amazon.co.uk

3) Samsung make the best sd cards on the market. [EDIT] just looked at all the others in the tread and it may not have fastest write but seems to read the fastest whoop.

4) Write 11.2 read 25.2

screen shot attached, was tested on my cm7 moto defy.

Though I would post what samsung say about the sd card as well

Safe even in seawater, every product is water-proof

Outstanding shockproof, withstanding the pressure of a 1.6 ton vehicle

Safe from the magnetic force of home theaters
[T-Mobile Samsung Galaxy S II SGH-T989] tigerz0202:
Pny 16gig class 10
[T-Mobile Samsung Galaxy S II SGH-T989] Splaktar:
My Adata 32 GB Class 10 is in line with the others posted here.
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
the PNY seems to be really good, test are consistently well above the minimum write speed
[T-Mobile Samsung Galaxy S II SGH-T989] tigerz0202:
yeah its pretty good ,i couldnt get over 12 write speed with the same card with my sensation and on the package it said up to 15 so im pretty much maxed out with the SGS2 ....great phone i love it
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
updated with 64GB results http://xdaforums.com/showpost.php?p=19196376&postcount=4
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
update with T989 internal SD results http://xdaforums.com/showpost.php?p=19196376&postcount=4
[T-Mobile Samsung Galaxy S II SGH-T989] suicidalintentions:
16g/class10/pny

I went the impatient route and went to the local staples and bought

Pny/class10/16gb for 39.99. Its killing me bc i never try to buy anything at ful price but sometimes you gotta do what you gotta do. I have several cards that i use for various things and this one is virtually free of save. Maybe 4gb have been used.
[T-Mobile Samsung Galaxy S II SGH-T989] Strapt:
wow .. I got to say that I wouldnt have thought PNY would test over their class number .. but it looks like they do so far .. along with ADATA too. These are some great results .. thanks everyone so far!
[T-Mobile Samsung Galaxy S II SGH-T989] Splaktar:
Is the OP going to be updated to summarize the data given so far?
[T-Mobile Samsung Galaxy S II SGH-T989] amir88:
Im using Lexar Class 10 High-speed card.

Im getting Write speed: 9.5 MB/s and Read speed: 24 MB/s

I got it for $30 (employee pricing at the place I work).
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
hmm... class 10 but you only get 9.5 write... it should have been rated as class 6, since there's no class 8 designation
[T-Mobile Samsung Galaxy S II SGH-T989] sfsilicon:
Glad I didn't pick this up at the last TigerDirect sale. It was going for ~$45. I already have a 32GB class 2 Sandisk card. I don't really need a faster one, but it never hurts. Maybe I'll be able to pick-up a class 10 card over the Black Friday weekend.
[T-Mobile Samsung Galaxy S II SGH-T989] iunlock:
Faster doesn't mean it's necessarily better. Samsung is extremely reliable. You have to factor in reliability.

ADATA, Samsung, LEXAR etc...SD cards are made in Korea...all very reliable.

Other brands are piece of crap Made in China...ie...eBay generics.

I've been running Samsung on all my devices and own all three brands mentioned above. Very reliable.

BTW BRILLIANT THREAD OP. We need more like this...simple and straight to the point.

---------- Post added at 09:56 AM ---------- Previous post was at 09:47 AM ----------

So far as of 11/14/11

FASTEST CARDS:

32GB's - ADATA Class 10

16GB's - PNY Class 10

?
[T-Mobile Samsung Galaxy S II SGH-T989] alleyezondisromo:
that is true about the samsung's i do feel very relaxed on its dependability
[T-Mobile Samsung Galaxy S II SGH-T989] amir88:
really ? hmm .. it still does the job for me anyways. I don't put musics/movies in my phone and I didnt pay much for it so it should be fine :D lol
[T-Mobile Samsung Galaxy S II SGH-T989] Docmjldds:
Adata 32Gb Class 10

OK...I most humbly appreciated the input re my Patriot 32Gb Class 10 so I placed your advice in my to do list and here it is:

Just bought the Adata 32Gb class 10 card for $63.00 on Amazon

Rewarded with much better results. Not using any SD card speed mods either.

Following is based on currently installed Juggernaut 2.6 ROM stock kernel.

Only posting one test but my minimum write speed was ONLY 14.3 :D

So...good by Patriot...hellloooooo Adata :rolleyes:

EDIT: My Bad...not Amazon...NewEgg

Thank you for shopping at Newegg.com. We're glad we had what you're looking for!

Item Number:	Item Description:	Quantity:	Price:

N82E16820211558	FLASH 32G|ADATA AUSDH32GCL10-RA1 R	1	63.99

DHL Tracking Number:

420890449102901015477002606103

(Shipped from Industry, CA)

Shipping Time: 11/11/2011 11:01:12 AM

Dial 1-800-805-9306 or visit http://webtrack.dhlglobalmail.com/ to track your package. If you have any questions or concerns while your order is in transit, please contact DHL Global Maill directly for inquiries.

Keeping You in the Know,

Your Newegg.com Customer Service Team
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
wow! that's sweet :D
[T-Mobile Samsung Galaxy S II SGH-T989] iworkout:
Can you verify the usable capacity of your 64gb card? The manual says that 32gb is the maximum it can handle.

Also, what is the app in the screenshots that you are all using to speed test?
[T-Mobile Samsung Galaxy S II SGH-T989] Kawaisa:
SD Tools, free on the market.
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
the information you seek is listed in the INDEX sticky

http://xdaforums.com/showthread.php?t=1324517
[T-Mobile Samsung Galaxy S II SGH-T989] Branso07:
I just ordered a Transcend 4GB Class 10 card. Anybody familiar with how well this class performs. I bought it on Newegg so I have a good chance of returning it if it doesn't work. Got it for $7.50
[T-Mobile Samsung Galaxy S II SGH-T989] Fus3D:
I got a 16gb class 10 and its fast as hell!
[T-Mobile Samsung Galaxy S II SGH-T989] Branso07:
That's good to hear! Can't wait to get it so I could start rooting.
[T-Mobile Samsung Galaxy S II SGH-T989] eep02b:
32gb class 4 sandisk. Bought for 25 on dailysteals.com

this test done as phone was scanning SD card for media.
[T-Mobile Samsung Galaxy S II SGH-T989] Hotstuff5964:
16gb, class 4, PNY from BestBuy. $20
[T-Mobile Samsung Galaxy S II SGH-T989] Jackzoor:
Adata Class 10 32gb
[T-Mobile Samsung Galaxy S II SGH-T989] Kid Poker:
Here is one that I picked up during Black Friday. It's a PNY 16gb Class 10 that was for $20.
[T-Mobile Samsung Galaxy S II SGH-T989] metdroid:
^good deal. Costs less and performs better than mine.

16gb patriot class 10. ~$30

Write = 11.7 Mb/s, Read = 19.5 Mb/s
[T-Mobile Samsung Galaxy S II SGH-T989] boostenmkiv:
Kingston 32G Class 4

Write 5.4

Read 15.0
[T-Mobile Samsung Galaxy S II SGH-T989] Branso07:
How do I test my SD card speed?

Sent from Hercules himself
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
the information is on page 1 of this topic
[T-Mobile Samsung Galaxy S II SGH-T989] pman860507:
32GB

Class 4 card.

Transcend 32 GB microSDHC Flash Memory Card TS32GUSDHC4E

Purchased from Amazon. 37.99

http://www.amazon.com/gp/product/B0056TYX8U/ref=oh_o02_s00_i01_details
[T-Mobile Samsung Galaxy S II SGH-T989] Hexidemic:
SanDisk 16 GB Class 4, purchased from Amazon vendor BoBoTechnic for $12.96 - unable to link since I don't post enough >.<
[T-Mobile Samsung Galaxy S II SGH-T989] boostenmkiv:
First off let me apologize for not having screenshots...I will try to re-take the test before sending these crap cards back to newegg

Wintec 32GB Micro SDHC FileMate Mobile Professional SDHC Model 3FMUSD32GBC10-R

Consistantly LESS than 10MB/s write speed and avg 14MB/s read speed.

Got these cards for $39.99 and hope newegg will take them back so I can pick up some adata instead.
[T-Mobile Samsung Galaxy S II SGH-T989] itsleeyo:
My results are

write: 10.2 mb/s

read: 25.4 mb/s

With SanDisk' 32GB
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
no needs for the images

the report you made is more than good enough

just as i suspected the Wintec is not a good brand
[T-Mobile Samsung Galaxy S II SGH-T989] setzer715:
Patriot LX Series 32Gb Class 10. Found here. NOTE: I paid $100 when it first came out. Now it is $50.

First a little history. This card does NOT work well in Cell Phones unless it is formatted in a VERY specific way. If you have purchased or plan to purchase this card find formatting instruction here. If you do not format with NO LBA then the card will eventually become corrupt requiring a reformat. I tested in a few phones and multiple ROM's, same results.

With that said, once I have it formatted properly I have been using it between multiple devices with zero issues. On to speeds.

The card seems to have good speeds depending on the app you test with. I ran 4 tests, all seem to be pretty consistent.

- Android App SD Tools - 12.5Mbps Write / 25.3Mbps Read
[T-Mobile Samsung Galaxy S II SGH-T989] KaneHusky:
SanDisk 32GB microSDHC Class 4 purchased for $39 from ebay:

5.6 MB/s Write

20.4 MB/s Read
[T-Mobile Samsung Galaxy S II SGH-T989] superuser696:
14.6 write 20 read

Topram class 10

Adjusted cache size to 1g through jrummy16's rom toolbox app

2 and 3g cache size had great scores also.

Other SD booster accelerator do great also.

Some of them predetermine the proper cache size.

Rom tool box did post higher scores but had less features.

---------- Post added at 09:44 PM ---------- Previous post was at 09:41 PM ----------

Oh ya my card is also partitioned for apps to SD

---------- Post added at 10:18 PM ---------- Previous post was at 09:44 PM ----------

The topram class 10. 16g in my sgs2 did 14.6wr and 20rd but I bought the same card for my roommate. And his amaze would only do about 6wr and 12rd. And I set his card up the same as mine exactly.

Disappointed in HTC lately

---------- Post added at 10:43 PM ---------- Previous post was at 10:18 PM ----------

They were 25 bucks a pop from amazon. They came with a SD to USB reader that I really like

Not for sure of the quality but it produces some of the fastest speed on the post.

Beastmod 4.0

Bullets 2.9b

With a shot of adrenaline
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
we only want results from SD Tools App

as the other results / windows app doesn't measure the internal transfer within the phone
[T-Mobile Samsung Galaxy S II SGH-T989] ardcifliku:
SanDisk 16 Gb class 2 ..... I use to have this on my htc hd 2 for 2 years.now I'm thinking to get a new one .
[T-Mobile Samsung Galaxy S II SGH-T989] cyi1:
PNY 32GB Micro SDHC Flash Card Model P-SDU32G10-EFS2

Write - 10.6 Read - 21.1

I love the card. It writes/reads very fast. When connected to my PC through the adapter I was getting 11.5-12.4 write speeds.

It is often on sale. I picked it up for $47.99 and used my Google offers Newegg gift card so I spent $27.99 shipped total. :)

PNY 32GB Micro SDHC Flash Card Model P-SDU32G10-EFS2

Item #: N82E16820178401

Standard Return Policy

$47.99

Subtotal	$47.99

Tax	$0.00

Egg Saver (4-7 Days)	$0.00

Gift Cards	-$40.00

Order Total	$7.99
[T-Mobile Samsung Galaxy S II SGH-T989] madman604:
both 32GB cards

Kingston Class 4:

SDC4/32GB01

5.1 write, 14.8 read

$60 when the Bell GS2 was launched

Retail Plus Class 10:

RP-MEMS-32GC10

7.5 write, 20.6 Read

$39 today
[T-Mobile Samsung Galaxy S II SGH-T989] Kueh:
Lexar 32GB Class 10, $60 @Futureshop on sale, $45 @Bestbuy on boxing day

Regular $130, In Canada
[T-Mobile Samsung Galaxy S II SGH-T989] sppena:
Lexar 16GB MicroSDHC Class 6 - $23 w/ boxing day sale
[T-Mobile Samsung Galaxy S II SGH-T989] ardcifliku:
Just got the new sd card.Patriot 16 GB class 10
[T-Mobile Samsung Galaxy S II SGH-T989] zonly1:
Picked up a Lexar 32 gb Class 10 at Amazon for 47.99 and free shipping (Prime).

Here is what I got:
[T-Mobile Samsung Galaxy S II SGH-T989] l33t p1mp:
1. Patiot, 32 gb, Class 10.

2. 40 dollars, www.newegg.com

3. Great card for the price. Even came with the standard sd adapter to plug it in to a computer easily.

4.
[T-Mobile Samsung Galaxy S II SGH-T989] GorillaPimp:
Memorex 16gb Class 6

$20 @ Amazon in 2010

Great card. Came with sd adapter. Other people got burned with Class 2 cards but this thing has been gold for me. Time to upgrade to a decent 32gb and give this to the wife.
[T-Mobile Samsung Galaxy S II SGH-T989] eaterz:
PNY 16GB class 10

1. 16GB class 10 PNY card

2. $20 on Amazon
[T-Mobile Samsung Galaxy S II SGH-T989] blchff04:
got the same one with same speeds
[T-Mobile Samsung Galaxy S II SGH-T989] xdarchitect:
Pass go or straight to jail

NewEgg has a 24 hour sale on kingston 32 gig micro sd cards "free Shipping" class 4 reads and writes 4MB/s.

My question is does anyone have this card, and has anyone found these speeds to be accurate, ect.?
[T-Mobile Samsung Galaxy S II SGH-T989] setzer715:
I believe one of the windows speeds you erased what THROUGH the USB port ON the phone. Therefore testing the internal speeds.

Limiting to one speed test app does not prove anything with the card as different apps test in different ways. For example, when I test with SD Tools as you state we should only test with the Read speeds do not stabilize before it is complete because the file is too small to test properly. Where as the software Sd Card Tester lets you adjust the file size you test with and you get a much more accurate reading.

---------- Post added at 08:29 AM ---------- Previous post was at 08:26 AM ----------

If you ever run into instability or data corruption follow these steps to properly format. PM me if you need assistance.

---------- Post added at 08:38 AM ---------- Previous post was at 08:29 AM ----------

My Patriot LX 32GB Class 10 after proper formatting.
[T-Mobile Samsung Galaxy S II SGH-T989] elbarto7:
do I really need class 10? I'm thinking of buying this http://www.newegg.com/Product/Product.aspx?Item=N82E16820313170
[T-Mobile Samsung Galaxy S II SGH-T989] setzer715:
Um, that is a class 10.
[T-Mobile Samsung Galaxy S II SGH-T989] elbarto7:
ended up getting this. class 4

http://www.newegg.com/Product/Product.aspx?Item=N82E16820313188
[T-Mobile Samsung Galaxy S II SGH-T989] xdarchitect:
confirmation

I have ATA class 10 32gig sd micro from newegg

with spds ranging Write13.4~14.9MB/s: Reading spd of20.4~21/mb/s
[T-Mobile Samsung Galaxy S II SGH-T989] wonderwrench:
Team 32GB Class 4

Team 32GB Class 4 purchased from the egg on sale for 31.49 with free shipping.

I wanted a class 10 but could not swing the cake needed.
[T-Mobile Samsung Galaxy S II SGH-T989] wonderwrench:
I did the same but got the one with the SD adapter when on sale, see post #87. Seems plenty fast to me. Video recording works fine in my testing. I'm happy with it.

Bill
[T-Mobile Samsung Galaxy S II SGH-T989] FwaZ:
got this one for $20 amazon

32gb. partition it. now 20gb.

No name and no Class... :D

using sd tools..
[T-Mobile Samsung Galaxy S II SGH-T989] DaemionIX:
AmazonBasics 16gb class 10 from Amazon.com for 26.99
[T-Mobile Samsung Galaxy S II SGH-T989] jordanishere:
I have no idea what class my card is but I think its similar to yours. Its also a sandisk 32gb.
[T-Mobile Samsung Galaxy S II SGH-T989] Insaneninjaguy:
MicroCenter house brand 8GB class 4. I payed 15 USD bout a year plus ago.

Write ~8.0MB/s

Read ~20.3MB/s

after format

Write 9.5MB/s

Read 19.6MB/s

Microcenter 16GB Class 10. 20 USD

Write 14.6MB/s

Read 19.9MB/s
[T-Mobile Samsung Galaxy S II SGH-T989] GorillaPimp:
Just got a new HP 32GB Class10 from Amazon. I have seen this around but with zero reviews. I decided to give it a try. $45 http://www.amazon.com/HP-Flash-Memory-Card-L1892A-EF/dp/B005WTSBHS
[T-Mobile Samsung Galaxy S II SGH-T989] rpolito73:
Using Samsung 32gb Class 10. Write speeds seem low but read speeds are good...
[T-Mobile Samsung Galaxy S II SGH-T989] PJcastaldo:
Patriot 16gb Class 10 Just got it off of NewEgg on sale for 20 Bones.
[T-Mobile Samsung Galaxy S II SGH-T989] lpnowlan:
AmazonBasics 16Gb Class 10
[T-Mobile Samsung Galaxy S II SGH-T989] Craigh83:
My old SanDisk class 2 8gb:

write speed = 7.1 MB/s

read speed = 20.8 MB/s

Tested with SD tools app
[T-Mobile Samsung Galaxy S II SGH-T989] DeathBlimp:
This is where i bought it

here's the results, tested with SDcardtester app. i thought it was a cheap knockoff since the back said "made in taiwan". even if it's fake it is fast.
[T-Mobile Samsung Galaxy S II SGH-T989] AllGamer:
hey thanks very interesting new SD bench App
[T-Mobile Samsung Galaxy S II SGH-T989] TheBrandonWRX:
Microcenter Generic 16gb Class 10. $18.99, on the receipt it says ADATA though.
[T-Mobile Samsung Galaxy S II SGH-T989] nick11evo:
Heres mine i fid a low test ... Cuz battery dieing ... I have 16 GB Class 10
[T-Mobile Samsung Galaxy S II SGH-T989] s10shane:
here is my speeds.. its a samsung 16gb class 10 micro sd card i got on ebay used for 16.99 out the door. here is two different sd speed test apps i used. they had different results which i thought was kinda odd.
[T-Mobile Samsung Galaxy S II SGH-T989] tmxrr:
Sandisk 32GB

1) SanDisk 32GB Class 4

2) $30.99 Amazon (I'd post a link but I can't, to new..)

3) Haven't used it much, but as the screenshot shows, it's doing exactly as it should. I haven't had any issues with it and has worked perfect so far!

4) Ugh, can't post outside image either, so attached it lol..
[T-Mobile Samsung Galaxy S II SGH-T989] rpolito73:
Retested my Samsung 32gb class 10. Not bad...
[T-Mobile Samsung Galaxy S II SGH-T989] thatlaoboi:
1) Samsung 8GB Class 4

2) I don't know. It comes with the Galaxy S 4G

3) I haven't used it long enough to really come up with an opinion. But its pretty good...
[T-Mobile Samsung Galaxy S II SGH-T989] titaneds73:
1).SanDisk 16g

2).amazon.com $13.00

3).class4

4.5 write speed,20.6 read speed
[T-Mobile Samsung Galaxy S II SGH-T989] DannyB513:
I just bought this same card and i am getting:

Write: 10.2 mb/s

Read: 24.5 mb/s

Paid $51.00 for it on Amazon.
[T-Mobile Samsung Galaxy S II SGH-T989] 8Fishes:
These are all invalid speed tests. What you all did was test the speed of the internal storage as opposed to external sd card.

Just an FYI.. the dead give away is the 'total' space that hovers around 10gb.

Bought myself a samsung 32gb class 10.. can't wait to test it :D
[T-Mobile Samsung Galaxy S II SGH-T989] savagepagan:
SanDisk 32GB Class 4 for $30 refurb from Daily Steals

Adata 32GB Class 10 for $42 from Newegg
[T-Mobile Samsung Galaxy S II SGH-T989] StickyK3ys:
A little disappointed in this Patriot 32gb Class 10.
[T-Mobile Samsung Galaxy S II SGH-T989] kaiserXDA:
SD write & read speeds

Here are speeds of two SD cards in my phone. My phone is rooted and running stock Gingerbread 2.3.6 UVKL1. 2GB SanDisk , purchased 3 years ago,at Office Depot. I don't remember what I paid. I got two results 8.0 write/ 18 read & 6.0 w/ 18.2 r. 16GB Lexar micro sd HC, class 4,purchased at Office Max 1 1/2 years ago for $30.00 I think. 2 results, 6.8 write/ 19.8 read, 6.5w/18.7 r.
[T-Mobile Samsung Galaxy S II SGH-T989] 8Fishes:
Ran my Samsung 32gb class 10 through the SD Card Tester.

Write: 10.39 MB/s

Reading: 11.63 MB/s

Little disappointing but it's alright.
[T-Mobile Samsung Galaxy S II SGH-T989] kinfauns:
I have a couple different cards for my phones...

1) Samsung, 32GB, Class 10

2) $35 + tax at Frys last week

3) No complaints

4) attached

1) Lexar, 32GB, Class 10

2) $45 + tax at TigerDirect/CompUSA 3 months ago

3) No complaints

4) attached

They both work fine and there are no real surprises in terms of performance.
[T-Mobile Samsung Galaxy S II SGH-T989] s10shane:
wow u have no idea what ur talking about do u?? i know for a fact that my test were using my external sd card which is a samsung 16gb sd card class 10. my internal 16gb would probably be much faster then my external sd card. here is proof for pics. my micro sd card has 14.99gbs free space vs the internal memory has 11.25gbs free. so please dont say my test are all invalid when they are perfectly fine. i posted my proof in pics when i tested both the internal vs external sd cards.

Internal Sd Card Speed Test:

Write Speed: 9.6 MB/s

Read Speed: 37.0 MB/s

External Sd Card Speed Test:

Write Speed: 8.0 MB/s

Read Speed: 19.1 MB/s
[T-Mobile Samsung Galaxy S II SGH-T989] 8Fishes:
I guess someone has to be right...

I'll also assume that since the SD Card test was ran, some stuff changed around in your phone. For kicks, if you want to double check which storage SD Card Tester is reading, change the path to /sdcard/external_sd/. That number on the right that is circled is your free space. and will change accordingly.
[T-Mobile Samsung Galaxy S II SGH-T989] EpicPie:
Patriot 16Gb Class 10.