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16 GB joyflash class 10 speed test

Hi Guys,
just got a new "16 gb class 10 joyflash micro sd' off of ebay for £18
I used h2test 1.4 with a micro sd adapter to test the speed with the test reading and writing 1GB of data
The test yielded results of 15.5 MB/s write and 16.8 MB/s read.
Are these the sort of results that I should be expecting and should they be good enough for me to use a data2ext etc rom?
Thanks

those speeds look good compared to what ive seen quoted for class 6. i think i'll buy the same as you, good value if its not fake!

I've done a complete test with h2testw and the card is indeed the full 16 GB (minus the space taken up by the fat)
I've also done this test with another card of the same type, from the same seller on ebay, that I bought for a friend and it achieved 15 MB/s write and 18.2 MB/s read. Might have to do a cheeky swap :L

any chance you can post up the item number please?
is it 110661046754 ?

yeh that's the item number of the one i got
http://cgi.ebay.co.uk/16GB-16-GB-Mi...AsAccessories_MemoryCards&hash=item19c3e991e2

just ordered one hope it improves 720p video recording im sick of it jumping evey few seconds on standard class 4 card

if i had known earlier,i bought a class 6 8gig kingston which i'm not satisfied at all guess i'll order one of these next time,thanks for sharing

mat_1_uk said:
just ordered one hope it improves 720p video recording im sick of it jumping evey few seconds on standard class 4 card
Click to expand...
Click to collapse
Ive just done the same. I use A2SD at the mo because i have a standard 8 gb class 4 i think...... crap!! Video recording lags like you said and also transferring albums takes its time too so cant wait to start using D2W
Thanks for your sharing dude!!

No problem guys
Thing is I was reading everywhere, "get this one", "or those ones are rubbish",
Was a bit confused, so kind of just took the leap and was pretty pleased with the speed test results, and the card didn't have a fake size or anything and the price was pretty cheap. Can't argue with that tbh
Im running cyanogenmod 7 rc3 atm, so it's not essentiall I have a fast sd card as the resived hboot partition table gives you loads of space.
Can't wait for a fully working gingerbread rom with sense.
Should be interesting to see what version of sense that htc give the desire gingerbread rom when it's released. Whether it'll be new, or the same one that shipped with froyo? I hope it new. But if it's not there will probably be a good desire hd port etc up in no time (then i'll need an ext partition :L)

This was the best thing I've ever bought... check my quadrant out on miui d2w. With 1 gb ext 4...
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Dude thanx so much for sharing this eBay item. Only took 3 days too.
Sent from my HTC Desire using XDA Premium App

Can't wait for a working gb sense too. Need a cam and hopefully d2w. Ha. Super fast gb sense. Got miui gb at the mo and love it.
Sent from my HTC Desire using XDA Premium App

how on earth can this be so cheap?
bugger, it does not ship to europe, why?

It is true. It's a. Brilliant buy. That's shame :-(
Sent from my HTC Desire using XDA Premium App

can anyone buy it for me and send? i got paypal

If u order it to me I can send on along as I get the postage allowance.
Sent from my HTC Desire using XDA Premium App

I'm not sure how much it would cost to send from here (england) to wherever you guys are in europe. But I don't mind buying one for someone else and sending it.
Haha yeh it is a good buy - and quick delivery
What results are you guys getting speed related? - I'm guessing the most accurate way to do it would be to test it on your computer through an adapter with the program i mentioned in the first post. But i could be wrong

it shouldn't be more then 2-3Ł.....normail cheapest option.

:O MATE i am getting one, nice find by the way! Class 4 is just not the one when it comes to D2SD or anything other than A2SD+....have you tried this with a ROM using d2EXT? or D2SD? what are your experiences if so?

Hi,
I bought the same card from same seller 16gb class 10 sd card. I am running lee droid 2.3 rom with 1gb ext 3. I did my test on my phone using sd card speed test couple of times it is showing my card write speed as 5 MB/s and reading as 14MB/s. Am i missing something here?

Tehe.
ronaldo9_r9 said:
Hi,
I bought the same card from same seller 16gb class 10 sd card. I am running lee droid 2.3 rom with 1gb ext 3. I did my test on my phone using sd card speed test couple of times it is showing my card write speed as 5 MB/s and reading as 14MB/s. Am i missing something here?
Click to expand...
Click to collapse
Yeh, i think basically the speed of your sd card in your phone when using ext partitions can depend on the kernel/how good the d2ext scripts are. I think a good thing to do to test the improvement of the sd card, is to do a quadrant test, and compare the benchmark to when you used last sd card.
Also test it in your computer to get a more accurate read/write speed. (and not through usb from phone because for some reason for me, that's very slow)
Dunno if any of you guys saw this
http://www.xda-developers.com/android/increase-the-reading-speed-of-your-sd-card/
pretty interesting. I haven't got around to doing it

Great Deal for 32GB Micro-SD ($47)

Picking this up for my G2x and figured I'd share this because it's such a great deal!
http://dealnews.com/A-DATA-32-GB-micro-SDHC-Class-4-Card-for-47-free-shipping/486573.html

A-data and class 4 suck both. Not a crazy deal though thanks for shearing.
Just my 2/100

I've had good luck with them! This will replace the 16GB one in the G2x right now, and I'll continue to use the Adata 16GB card in the Acer A100(finally a fairly priced tablet!). In fact that card was used in my Nexus One, prior to me getting the G2x.

Antigen said:
A-data and class 4 suck both. Not a crazy deal though thanks for shearing.
Just my 2/100
Click to expand...
Click to collapse
Class 4 is decent; anything above it they optimize it for higher sequential read at the cost of random r/w(class 6 means 6mb/s sequential)...most(if not all) class 4s outperform class 6 and 8 at random r/w

All of my SD cards have been ADATA for years and I have yet to have a single one fail me in any way. Unlike many other brands in the same price range.

rauelius said:
Picking this up for my G2x and figured I'd share this because it's such a great deal!
http://dealnews.com/A-DATA-32-GB-micro-SDHC-Class-4-Card-for-47-free-shipping/486573.html
Click to expand...
Click to collapse
Thanks for the heads up dogg.. Thanks hit, great deal.. The hater underneath mad cause he paid 75$ for the same thing..lol

bakedpatato said:
Class 4 is decent; anything above it they optimize it for higher sequential read at the cost of random r/w(class 6 means 6mb/s sequential)...most(if not all) class 4s outperform class 6 and 8 at random r/w
Click to expand...
Click to collapse
So if someone wanted to get an sd and partition a section as swap, you're saying a class 4 would outperform a class 10?

He didn't mention anything about a class 10. And no, a class 4 won't out perform a class 10.
Veei said:
So if someone wanted to get an sd and partition a section as swap, you're saying a class 4 would outperform a class 10?
Click to expand...
Click to collapse
Sent from my LG-P999 using XDA App

Actually, he did mention a class 10. He said anything above a class 4 is optimized for read and takes a hit on r/w performance. 10 is higher than 4, hence, my question.
So, you're saying a class 10 will outperform a class 4 when used as a swap? I would have assumed that the higher the class, the higher the performance for read and r/w. Had not heard of what bakedpotato was talking about with r/w taking a dive the higher class you get.
Just trying to understand as I am interested in finding the answer.

Just thought I'd share... Unless SD Tools is inacurate for this kind of test, it looks like write is decently faster on class 10 than class 4. Just got my PNY 32 gb sd from provantage (~$55 btw). Ran a test for write and read for both PNY 4gb class 4 and PNY 32gb class 10. Was expecting a bit more from the class 10 on reads but still better than the 4. Screens attached...
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Veei said:
Actually, he did mention a class 10. He said anything above a class 4 is optimized for read and takes a hit on r/w performance. 10 is higher than 4, hence, my question.
So, you're saying a class 10 will outperform a class 4 when used as a swap? I would have assumed that the higher the class, the higher the performance for read and r/w. Had not heard of what bakedpotato was talking about with r/w taking a dive the higher class you get.
Just trying to understand as I am interested in finding the answer.
Click to expand...
Click to collapse
I saw a benchmark roundup somehwere(let me see if i can find it) saying so,in addition I found setting up class 4s for swap vs. class 10s didn't yield a clear winnner in terms of user experience. The difference between class 2 and 4 was night and day though.
Oh and what was your benchmark benchmarking? In addition I suspect that size matters when it comes to speed...(no pun intended)
Sent from my LG-P999 using XDA Premium App

bakedpatato said:
I saw a benchmark roundup somehwere(let me see if i can find it) saying so,in addition I found setting up class 4s for swap vs. class 10s didn't yield a clear winnner in terms of user experience. The difference between class 2 and 4 was night and day though.
Oh and what was your benchmark benchmarking? In addition I suspect that size matters when it comes to speed...(no pun intended)
Sent from my LG-P999 using XDA Premium App
Click to expand...
Click to collapse
Yeah, really not sure what exactly the benchmark is doing on write tests. It could very well just be writing one big file which wouldn't do well for gauging swap file performance. Not sure. I'm a network and systems guy. Not very good with the hardware side but your original post wouldn't shock me if it were true. Was very interested in finding out.

Veei said:
Yeah, really not sure what exactly the benchmark is doing on write tests. It could very well just be writing one big file which wouldn't do well for gauging swap file performance. Not sure. I'm a network and systems guy. Not very good with the hardware side but your original post wouldn't shock me if it were true. Was very interested in finding out.
Click to expand...
Click to collapse
I am only glad to have an intelligent and flame free conversation here so no worries.
http://forum.xda-developers.com/showthread.php?t=1005633
shows class 4s at the top of the list for small (4kb is I think the block size of a NAND cell most of the time) blocks of random data at a queue depth of 32.
However, I guess what I should've said is that "Class 10/8/6 won't mean any better ux for you on android"

Thx for that. I'll read through it tomorrow. I was thinking about setting up swap on this class 10. Last time I tried to use a swap, I didn't see any improvement. Though, that was on the 2nd android ever realeased (original my touch) and it was running froyo or gb. Ha!
CM7 and MIUI are both really friggin' fast on this phone so not sure it'll do much good.
Have you tried? What about setting a swap internal storage? Possible? Speed?

Help Buying Sd Card!

Hi, I've found four 32GB Sd cards:-
1. Sandisk memory card Class-10
2. Sandisk memory card Class-4
3. Transcend memory card Class-4 (Height 15mm)
4. Strontium memory card Class-10 (Height-11mm)
Q1. Which one should I buy? (i.e. the best one)
Q2. Also, is there any "Height" issue (...if I bought a misfit sd card)?
Q3. Will it be compatible with my Galaxy Fit?
(For the 1st time I'm buying them online, so I'm xtremely worried!!)
Pls. help!!
Sent Via XDA™ Premium

1. The more the class,the better will be its r/w speed..so go for the class 10 only.
I have no idea whether strontium one is better or sandisk, but latter sounds a trustworthy brand.
2.Please make sure you're buying a Micro SD card
All micro sd have same dimensions : 15mm(Length) x 11mm(Width) x 1mm(Height).
And looks like this -
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Not this -
3.Yeah,fit supports upto 32GB.

Harryhades said:
1. The more the class,the better will be its r/w speed..so go for the class 10 only.
I have no idea whether strontium one is better or sandisk, but latter sounds a trustworthy brand.
2.Please make sure you're buying a Micro SD card
All micro sd have same dimensions : 15mm(Length) x 11mm(Width) x 1mm(Height).
And looks like this -
Not this -
3.Yeah,fit supports upto 32GB.
Click to expand...
Click to collapse
OMG!!! I actually didn't know about this sd card.
Thnks for ur precious advice.
& yeah! All of 'em showing this kind of preview
Brand:-Sandisk
Model:-Mobile Ultra 32GB Class 10
Type:-MicroSDHC
Should I go for it??
Sent Via XDA™ Premium

buying sd card
Galaxy_Rohit said:
Hi, I've found four 32GB Sd cards:-
1. Sandisk memory card Class-10
2. Sandisk memory card Class-4
3. Transcend memory card Class-4 (Height 15mm)
4. Strontium memory card Class-10 (Height-11mm)
Q1. Which one should I buy? (i.e. the best one)
Q2. Also, is there any "Height" issue (...if I bought a misfit sd card)?
Q3. Will it be compatible with my Galaxy Fit?
(For the 1st time I'm buying them online, so I'm xtremely worried!!)
Pls. help!!
Sent Via XDA™ Premium
Click to expand...
Click to collapse
i bought 8gb sd card class 4 ,1/2 year ago from a online store then again a 16 gb card from electronics market(in my city)........
one of my juniors also bought the same 8gb class 4 transcend sd card, and using after sometime it got bricked....
So.. wander in electronis market in your town/city and get competetive price plus still you can bargain for a lesser price..Yay

32GB (MicroSDHC) card's market price ≈ 2,700 & that's for class 4. But online is approx. 2,000 for class 10.
Sent Via XDA™ Premium

buying sd cards
Galaxy_Rohit said:
32GB (MicroSDHC) card's market price ≈ 2,700 & that's for class 4. But online is approx. 2,000 for class 10.
Sent Via XDA™ Premium
Click to expand...
Click to collapse
Standard shops will give you MRP price( without or less discount) while shops selling electronic products in bulk(mostly smartphones/mobiles) sell at muh lower price. You will get a price nearer to what you saw on the internet...PLUS they dont know the basic diff of class of sd cards you can easily snatch u want to buy..
My point was with online stores u have to be cautious otherwise there is no problem..

mni ANKIT said:
Standard shops will give you MRP price( without or less discount) while shops selling electronic products in bulk(mostly smartphones/mobiles) sell at muh lower price. You will get a price nearer to what you saw on the internet...PLUS they dont know the basic diff of class of sd cards you can easily snatch u want to buy..
My point was with online stores u have to be cautious otherwise there is no problem..
Click to expand...
Click to collapse
Yep! but std. class cards are rarely available & that "too" of a trusted brand... ... almost impossible.
Be cautious??
... about what?
Sent Via XDA™ Premium

Galaxy_Rohit said:
Yep! but std. class cards are rarely available & that "too" of a trusted brand... ... almost impossible.
Be cautious??
... about what?
Sent Via XDA™ Premium
Click to expand...
Click to collapse
Standard class 10 sd cards are readily available all over the globe..Maybe they are less popular of their pprice over their class4 or class6 brothers
Be cautious about the site from you are buying from they can be fake or cheap duplicate ones from china....
My brother recently bought samsung 8GB micro sd card CLASS 6 from Electronics market for Rs.300/-..

Galaxy_Rohit said:
Hi, I've found four 32GB Sd cards:-
1. Sandisk memory card Class-10
2. Sandisk memory card Class-4
3. Transcend memory card Class-4 (Height 15mm)
4. Strontium memory card Class-10 (Height-11mm)
Q1. Which one should I buy? (i.e. the best one)
Q2. Also, is there any "Height" issue (...if I bought a misfit sd card)?
Q3. Will it be compatible with my Galaxy Fit?
(For the 1st time I'm buying them online, so I'm xtremely worried!!)
Pls. help!!
Sent Via XDA™ Premium
Click to expand...
Click to collapse
no problem at all bro....
as the fit supports upto 32gb...
all are fyn....
and i would recommend you to a class 10 mmc coz its transfer rates are very good and also good in custom roms...
press thanx if helped..

32gb sd card does not hangs in our Fit??
Sent From Mobile Network

ak.mohanty said:
32gb sd card does not hangs in our Fit??
Sent From Mobile Network
Click to expand...
Click to collapse
Samsung Galaxy Fit supports SD Card of 32 GB.
Specifications:
http://www.gsmarena.com/samsung_galaxy_fit_s5670-3726.php

ak.mohanty said:
32gb sd card does not hangs in our Fit??
Sent From Mobile Network
Click to expand...
Click to collapse
No it doesn't.Samsung claimed G-fit supports SD cards up to 32gb. To get better performance use class10 SD cards
Press thnx button if it was helpful(plz)
Sent from my GT-S5670 using XDA

ehsan h97 said:
No it doesn't.Samsung claimed G-fit supports SD cards up to 32gb. To get better performance use class10 SD cards
Press thnx button if it was helpful(plz)
Sent from my GT-S5670 using XDA
Click to expand...
Click to collapse
Only class 10 SD card will work?
Press Thanks On Getting Helped

sandy4u said:
Only class 10 SD card will work?
Press Thanks On Getting Helped
Click to expand...
Click to collapse
No. U can also use class 4 cards,but remember u will decrease ur dev performance n speed(in comparison with class 10) of course u have to pay much more
Press thnx button if it was helpful(plz)
Sent from my GT-S5670 using XDA

How 2 verify a "class 10" memory card?
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Galaxy_Rohit said:
How 2 verify a "class 10" memory card?
Sent Via XDA™ Premium
Click to expand...
Click to collapse
I don't understand you. On card in the circle writes number 10.

I saw some are coloured. I looked for sandisk class 10. It was class 10 but nowhere written on the card(only coloured card with "Sandisk" written). I don't wanna get fooled with the fake one.
Sent Via XDA™ Premium

Thnks guyz for all ur help!!:thumbup: I got my Sandisk class 10 32GB Mobile Ultra memory card yesterday evening.
Sent Via XDA™ Premium

Which 64gb microsdxc card will you get?

Just wondering which 64gb microsdxc cards are you guys looking to use with your new s4? WIth al the issues with the sandisk 64, wondering if it's worth paying the little extra for samsung 64gb pro UHS1 (does the s4 support that speed?) Anyone know?
Also are you guys planning to use exfat? I hear some of the roms w/the old s3 had issues with exfat and needed fat32

Haven't heard of any problems with the s4, pretty sure there will be more info by next saturday

So I ended up getting the samsung 64gb microsdxc UHS1 speed rated, and also bought a USB 3.0 card reader that supports it. I suspect however the s4 (like the s3) will not support the higher UHS speeds:

I ordered the same card yesterday. I think the quality is alot better than sandisk. And even if the sgs4 dont support the full speed. It's still worth the few bugs more.
But maybe it do support it? Will have to wait and see.
Sent from my GT-I9300 using xda app-developers app

the SanDisk Ultra 64 GB MicroSDXC Class 10 works great never given me any problems

djq said:
the SanDisk Ultra 64 GB MicroSDXC Class 10 works great never given me any problems
Click to expand...
Click to collapse
That's also what I have. I've had no problems using it in my Sansa Fuze and Galaxy S.
Sent from my iPad using Tapatalk HD

I'm using Sandisk 64gb sdxc and it is very good. No problems with this card.
Wysłane z Galaxy S3

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Yeah the sandisk is no doubt good enough. But the samsung is faster. But the question is. Does the phone even support the ekstra speed.
Sent from my GT-I9300 using xda app-developers app

Don't you have a promotional deal from Samsung in your country? We, in the Netherlands, get a 64gb c10 sd card from Samsung with the S4.

i really love faster loading apps, though i'm normally limited in how many apps i can store on the sd card... however!
-the faster write speed will definitely come in handy when taking dual shot video
-the faster read speed is definitely worth getting UHS-1 but i doubt that you will notice much difference between the sandisk and samsung versions no matter what you're doing.
still, much thanks for the benchmarks, the samsung card will definitely offer a more future-proof solution

How does the Samsung 64GB MicroSD stack up in terms of speed vs the Galaxy S4 internal memory? Also, is it worth the extra $10 or so for the Samsung version vs Sandisk?

Kapitein187 said:
Don't you have a promotional deal from Samsung in your country? We, in the Netherlands, get a 64gb c10 sd card from Samsung with the S4.
Click to expand...
Click to collapse
Yes, that's also the case for me (also from the netherlands)
But Im currently using a sandisk 64gb class 10 and it also works good in my note2 (formatted as fat32 tho)

testinguser said:
Just wondering which 64gb microsdxc cards are you guys looking to use with your new s4? WIth al the issues with the sandisk 64, wondering if it's worth paying the little extra for samsung 64gb pro UHS1 (does the s4 support that speed?) Anyone know?
Also are you guys planning to use exfat? I hear some of the roms w/the old s3 had issues with exfat and needed fat32
Click to expand...
Click to collapse
djq said:
the SanDisk Ultra 64 GB MicroSDXC Class 10 works great never given me any problems
Click to expand...
Click to collapse
What issues are you referring to, testinguser? I'm using the same card mentioned above in my SIII with no issues.....

http://www.phonearena.com/news/SanDisk-says-it-produced-some-bad-32GB-and-64GB-microSD-cards_id40986

KryptosXLayer2 said:
What issues are you referring to, testinguser? I'm using the same card mentioned above in my SIII with no issues.....
Click to expand...
Click to collapse
my 32gb sandisk was effed in my s3, mounted and unmounted every minute, could take a battery from 100 ~ 30 in an hour with screen off in your pocket.. replaced it with a new one and has worked fine since, there's a visual difference of the memory array on the card, so i think there's a upgraded hw version of the sandisk microsd cards. got my bad one from bestbuy last black Friday
Sent from my GT-I9300 using xda app-developers app

Huh.... strange, I bought mine during Black Friday too, not from BBY though, and hasn't caused any problems! But that's what "a bad batch" means, I wasn't in that batch, thankfully

thats good news!! i have not had a bad card either

testinguser said:
Just wondering which 64gb microsdxc cards are you guys looking to use with your new s4? WIth al the issues with the sandisk 64, wondering if it's worth paying the little extra for samsung 64gb pro UHS1 (does the s4 support that speed?) Anyone know?
Also are you guys planning to use exfat? I hear some of the roms w/the old s3 had issues with exfat and needed fat32
Click to expand...
Click to collapse
I went with SanDisk because I've had the fewest problems with that brand compared to say Sony or PNY. I tried using the card as exFAT and ran into problems. Furthermore, it's incompatible with CWM (due to the Microsoft patent, they can't include support), so I used guiformat to reformat it FAT32, and now it runs smoothly and is visible to CWM. Having so much room at hand is quite liberating.

For what it's worth, the 64GB Samsung Extreme Pro card is $49.99 at your local Frys (if you have one nearby) until 5/23.
http://images.frys.com/art/facebook/newspaperads/051713a_preview/P1_FRI_051713.html
If not, Amazon recently dropped their pricing to $52.98 shipped.
http://www.amazon.com/Samsung-Electronics-microSDXC-MB-MGCGB-AM/dp/B009SK57ZQ

djq said:
the SanDisk Ultra 64 GB MicroSDXC Class 10 works great never given me any problems
Click to expand...
Click to collapse
Picked that up at Radio Shack for $43 before Christmas. Formatted it to fat32 for my Note 2 and popped it in the S4 with no issues.
When I buy another one it'll be SanDisk or Samsung.
Sent from my SPH-L720 using Tapatalk 2

MicroSD. Which one to buy?

I bought a 64Gb MicroSD for little money. It is not brand, but when I copy large amounts of files from the PC (ie music), then when I put it on the phone, the music disappears. This problem can be given by the poor quality of MicroSD? What do you recommend? A MicroSD Samsung Evo may be okay?
Sent from my GT-I9505 using XDA-Developers mobile app

I have made (and still have) good experiences with Samsung, Toshiba and Transcend cards. Rather bad (or mixed) experiences with SanDisk cards. I wouldn't say that SanDisk cards are in general of bad quality - my guess is that there are many fake SanDisk cards on the market.
Currently I'm using a 128 GB Samsung Evo card.
Sent from my black pearl using Tapatalk

Kingston may also be a good option. Using my 32GB Class 10 for well over a year now. Granted, I do not copy much between a PC and the card, but I do move a lot of stuff between the internal storage and the sd card.

Was using a sadisk 16gb card, and now a lexar 32 GB card. Virtually no difference, besides storage space. I find it unnecessary to buy an expensive cardz when I've never had a single problem with the cheaper brands, and not the "top of the line" cards like the overpriced Samsung cards.
Really, go with any brand. I see a lot of articles about certain cards having problems with the s4, but you gotta understand, those are isolated incidences, and the other thousands of people that don't have problems with their SD card and this phone don't go online to complain about them.
Sent from my SGH-M919 using XDA Free mobile app
---------- Post added at 08:18 PM ---------- Previous post was at 08:17 PM ----------
As for your particular problem, might be a problem with the connection between your phone and the PC, and not the SD card.
You should buy a different brand, and see if it does the same thing.
Sent from my SGH-M919 using XDA Free mobile app

The Real SPEED of S4 !!!!!!!!!!!!
I'm a pro of microSD and Galaxy S4.
Hear that :
Galaxy S4 can only read and write on external microSD card at 21,7 Mo/s max !!!!!
So buying a Sandisk Ultra (read : 45, write : 13) would not be a good choice according to me...
You should buy a Sandisk Extreme (read : 90, write : 45), to enjoy a bit more speed, for 3$ more expensive...

I had a bad experience with Lexar ( same for this guy -> https://youtu.be/aO-imP0qTQY
At the moment I'm using samsung EVO+ 128gb and its perfect got it for around 30$US from a store (Best Buy)

SD Cards recommended (and not)
Mostly any BRAND SD cards are recommended. Which ones you ask? Lexar, Kingston, Adata, SAMSUNG. It's going to be sad if you buy a Generic or Off-Brand one. Why? Well, they don't always come with their real capacity (claiming to be 8GB, and they're really 4GB or 2GB), they're REALLY delicate or unreliable, and some are known to not work AT ALL out of box. So yeah, there's the best, VERY-IN-DEPTH guide the world has ever seen. Maybe.

TFutoMaki said:
I had a bad experience with Lexar ( same for this guy -> https://youtu.be/aO-imP0qTQY
At the moment I'm using samsung EVO+ 128gb and its perfect got it for around 30$US from a store (Best Buy)
Click to expand...
Click to collapse
Probably just an isolated incident. Had this lexar for the past 7 mos. and still working flawlessly.
Sent from my SGH-M919 using XDA Free mobile app

I would recommend KIngston at any form

Got a 32Gb Samsung EVO microsd with my S4 3 years ago - it lasted about 6 months before it packed up. What a bunch of crap from Samsung.
Currently using a cheap old class 4 sandisk 16Gb (which was inherited from my old Blackberry 9300 (from back in the day ) now for the past 2 years or so without hassle - smooth sailing! And the sdcard is probably 4/5 years old now!
Moral of the story: Fastest/most expensive/<insert brand name> IS NOT ALWAYS the most reliable/best way to go.

I always use either SanDisk or Samsung EVO/EVO+, never had issues with either.
---------- Post added at 12:07 PM ---------- Previous post was at 11:59 AM ----------
cedric3 said:
I'm a pro of microSD and Galaxy S4.
Hear that :
Galaxy S4 can only read and write on external microSD card at 21,7 Mo/s max !!!!!
So buying a Sandisk Ultra (read : 45, write : 13) would not be a good choice according to me...
You should buy a Sandisk Extreme (read : 90, write : 45), to enjoy a bit more speed, for 3$ more expensive...
Click to expand...
Click to collapse
So what you're saying is that even though the phone can only read @ 21 mb/s MAX, buying a card that has 90 mb/s read speeds somehow makes it faster?

christoophat said:
I always use either SanDisk or Samsung EVO/EVO+, never had issues with either.
---------- Post added at 12:07 PM ---------- Previous post was at 11:59 AM ----------
So what you're saying is that even though the phone can only read @ 21 mb/s MAX, buying a card that has 90 mb/s read speeds somehow makes it faster?
Click to expand...
Click to collapse
Yes, S4 is limited at 20Mo/s in read and 20Mo/s in write,
so no benefits at all with a sdcard with 90Mo/s in read,
but 40Mo/s instead of 10Mo/s is a very big benefits(10->2X faster !!!)
So I have bought a 200GB Lexar 633x (90, 40) at 120$, and it works like a charm on my S4 !

EVO 64B here...no promblems yet. :fingers-crossed:

http://www.mymemory.co.uk/Micro-SDX...icro-SD-(SDXC)-Card-+-Adapter-80MB_s-Class-10

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is this original or duplicate??? Help
Sent from my Lenovo K50a40 using XDA-Developers mobile app

Probably should ask the seller that question?

Athakuri700 said:
is this original or duplicate??? Help
Sent from my Lenovo K50a40 using XDA-Developers mobile app
Click to expand...
Click to collapse
How much did you pay for it? I find Samsung to be over priced. Got me a lexar microSD card at a cheaper price, and no complaints.
I think brand name SD cards are overrated, IMO. Some of them get bad reviews, and say how they mess up badly after a while, but I think that's just a case of rare instances, or got a defected model. Never had a problem with the cheaper brands, ever.
Sent from my SGH-M919 using XDA Free mobile app

ReyDelGuaguanco said:
EVO 64B here...no promblems yet. :fingers-crossed:
Click to expand...
Click to collapse
Funny thing, my EVO64 went corrupt today. Seems like some sectors in the begging track went kaput...cant delete files, cant format the drive..NADA!...It lasted 6 mos..... BOOO!!

Samsung PRO Class 10 (UHS 1) have 90 Read and 55 Write.
---------- Post added at 12:57 PM ---------- Previous post was at 12:53 PM ----------
See Specs:
http://www.samsung.com/us/support/owners/product/MB-MG64DA/AM

I use Samsung, but I've also used Transcend which are good and also Kingston are fine.