Hello XDA.
I have some questions about MicroSD cards in our phone. First of all, what is the maximum space it can handle? 32gb? And, what is the difference between class 4, 6, 10, etc. I know it has something to do with writing speed. But what is the maximum writing speed our phone can do? So i mean, the maximum class sdcard it can handle.
Thanks in advance.
Hi,
Yes 32gb is the max space this phone can handle.As far as i know classes are the write speed to the max of which data can be written on memory card.My friend uses class 10 mem card n i seen the data transfer of 9.8mbps on his phone,so surely it can write atleast at 9.8 mbps.i had used 32 gb card class 4 it was taking a bit long to load.right now i am using class 6 16gb sandisc its working great.
Related
Hi
I bought a Kingston 8GB SDHC Class 4 card today, I used a Class 2 before, anyway, I copied a lot of music (about 4GB) to the card from the computer but I don't even get close to 4MB/s only 1.38MB/s, have I done something wrong or is it a problem with the card?
thanks
If you're copying file to your phone over usb it will be capped at 2MB/s. It's the phone's fault, not your card. I bought a 16gb class 6 without knowing this and now I have to take my memory card out if I want to take advantage of the write speeds.
Gille1 said:
Hi
I bought a Kingston 8GB SDHC Class 4 card today, I used a Class 2 before, anyway, I copied a lot of music (about 4GB) to the card from the computer but I don't even get close to 4MB/s only 1.38MB/s, have I done something wrong or is it a problem with the card?
thanks
Click to expand...
Click to collapse
You may have been scammed. To know for sure, you should run the h2testw program against the new card. It's quite common for scammers to pass off 2GB cards as 8, 16, or even 32GBs. They can program the card to tell your PC that they are bigger than they actually are.
The h2testw script can test this by writing 8 1GB files (approximately) to your card.
Good luck!
Hello!
I bought Kingston 16gb class 10 micro sdhc card and I tested it on my nexus one getting result 6mb/s and in unbutu getting same results. Both was directly pluged (Not Usb). I closed every running application in nexus one and I got same result. I also tested in different partitions and in ext2 I was getting little slower result than in fat32. But both were same or under 6mb.
Is there something wrong with the card or is it issue with nexus one that android 2.2 doesnt support class 10?
elkyur said:
Hello!
I bought Kingston 16gb class 10 micro sdhc card and I tested it on my nexus one getting result 6mb/s and in unbutu getting same results. Both was directly pluged (Not Usb). I closed every running application in nexus one and I got same result. I also tested in different partitions and in ext2 I was getting little slower result than in fat32. But both were same or under 6mb.
Is there something wrong with the card or is it issue with nexus one that android 2.2 doesnt support class 10?
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Click to collapse
please include where it was purchased, how much, and if there are any serial numbers/stamps on the card. there are known fakes in circulation (even brick and mortor retailers) fyi.
http://www.verkkokauppa.com/popups/prodinfo.php?id=1244 , bought for 101 euros. Serial in the card: SDC10/16GB N0206-001.AD00lF Taiwan.
ANd on adapter reads CHINA
wow thats really slow i have a 16Gb class 4 and i get 7 ~ 8 mb write speeds when the card is in N1 and connected with usb.
I would assume it's the card because as I and someone else stated above, get higher speeds with a lower class card.
As stated here:
It's my understanding that the "Class" simply refers to speed rating and thus should not effect compatibility. As long as the card supports the microSDHC standard and isn't any larger than 32gb it should work. You should also note however that in the past, vendors have claimed a higher class rating when the card did not actual perform that fast. I suggest buying from a trusted vendor with a good name.
32GB SD Card
Anyone tested the 32GB card, I know it's only class 2....
Android Class 10, SDHC3.0 compliant ?
elkyur said:
Hello!
I bought Kingston 16gb class 10 micro sdhc card and I tested it on my nexus one getting result 6mb/s and in unbutu getting same results. Both was directly pluged (Not Usb). I closed every running application in nexus one and I got same result. I also tested in different partitions and in ext2 I was getting little slower result than in fat32. But both were same or under 6mb.
Is there something wrong with the card or is it issue with nexus one that android 2.2 doesnt support class 10?
Click to expand...
Click to collapse
Class 10 should be supported, but they are usually SDHC3.0 card which is new I think...
I have a kingston class 10 as well, same issue, read speed is good but write speed is rated as 2gb, I tried to change the sector size to 4k and still the same.
For those thinking it's a fake card it is not! when I place the card in an adaptor I do 10MB write and close to 16MB read so this is a class 10.
I am not sure if it's the SDC tester app that is wrong or the phone
but since the phone behave fairly well compared to my class 4 card it could be the application. I will do some internal transfer tomorrow to see how fast they go
me too
P00r said:
Class 10 should be supported, but they are usually SDHC3.0 card which is new I think...
I have a kingston class 10 as well, same issue, read speed is good but write speed is rated as 2gb
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Same card on my HTC Desire... same results... only 2mb/s write beside 15Mb/s read
gary.lavin said:
Anyone tested the 32GB card, I know it's only class 2....
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Click to collapse
See my comparison of Sandisk 16Gb vs Kingstonm 32Gb Class 4 card :-(
http://forum.xda-developers.com/showthread.php?t=830087
I just saw your thread in this forum after I posted mine in the other
Sorry
G.
Hi guys
i recently received my Sandisk Class 4 16gb micro sd card, but im getting pretty slow speeds with it.
Its currently in FAT32 format.
When transferring files from my computer to the card via the usb cable, im getting 3mbps, which is much slower than what ive seen others get with a class 2 sandisk microsd card.
Also when i test the card using 'SD tools' in the app market it says it should have write 5.7, read 10.4, which is not what im getting and still slower than results ive seen others get with class 2 sandisk microsd cards.
I also have an old 2gb Verbatim card (with no class markings), which is currently in FAT format (not FAT32), that came free with an old phone, that seems very quick when transferring files, much quicker, and in SD Tools it gets - write speed 2mbs, read speed 17 mbps.
Questions -
What format should i set the card to maximize performance (not using app2sd)?
Is a smaller capacity card of the same class faster?
(is a class 4 8gb faster than class 4 16 gb?)
Is FAT faster than FAT32?
Is my card defective?
Should i return it for a class 2 as they seem to be faster?
Hope you can help
For starters, which of those 2 file system is really faster don't matter because you cannot use FAT16 on your 16GB card. FAT16 only supports up to 2GB.
Also, class 4 is suppose to be faster than class 2.
sounds like you got a fake Sandisk Class 4 16gb, a knockoff market imitation with low quality component
what is the actual speed test result of the write?
AllGamer said:
sounds like you got a fake Sandisk Class 4 16gb, a knockoff market imitation with low quality component
what is the actual speed test result of the write?
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Click to collapse
Thanks for the reply allgamer, I've seen many of your posts on these boards and your very helpful
My actual write speeds are 3mbps, when transferring from my pc to the phone via usb cable.
I got the card from play.com so I didn't expect it to be fake. Are there any other tests I could do to confirm its authenticity?
Should I try different file systems like ext2 or fat etc?
3MB/s for a class 2 card is pretty good. I don't what you can expect more from that.
I have an Kingston 16Gb Class 4 and the writing speed from pc -> phone is like 2MB/s, much slower then it should. But in SD Tools its shows 4 or 4.8 MB/s writing speed.
dukuletz said:
3MB/s for a class 2 card is pretty good. I don't what you can expect more from that.
I have an Kingston 16Gb Class 4 and the writing speed from pc -> phone is like 2MB/s, much slower then it should. But in SD Tools its shows 4 or 4.8 MB/s writing speed.
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Click to collapse
The card I got is a class 4, and being a san disk I expected better write speeds.
What is really confusing is why the 2gb card (with no class markings) I got free with an old phone is much faster at transferring files via usb despite it getting a much lower score in SD tools.
Can anyone explain that?
Does class 10 really matter? I know according to sandisk its 32gb http://www.amazon.com/gp/product/B007XZM6VG/ref=ox_sc_act_title_2?ie=UTF8&smid=ATVPDKIKX0DER has a speed of 30MB/S. Reading into it on sdcard.org https://www.sdcard.org/consumers/cards/ on the bottom they say you should only get cards that the device will support the speed of. Example if you have a system that only supports SD-RAM PC100 you can put PC133 in it but it will down clock to PC100. My question is does the skyrocket support writing at class 10 UHS-1 speed?
tjsooley said:
Does class 10 really matter? I know according to sandisk its 32gb http://www.amazon.com/gp/product/B007XZM6VG/ref=ox_sc_act_title_2?ie=UTF8&smid=ATVPDKIKX0DER has a speed of 30MB/S. Reading into it on sdcard.org https://www.sdcard.org/consumers/cards/ on the bottom they say you should only get cards that the device will support the speed of. Example if you have a system that only supports SD-RAM PC100 you can put PC133 in it but it will down clock to PC100. My question is does the skyrocket support writing at class 10 UHS-1 speed?
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For reference I have a 16GB Class 6 Transcend mSD and get Write 12.5MB, Read 9.5MB (weird) with SDTools (Google Play). But not all class X cards are made alike. Depending on what you do with the card, random access and random write might be much more important bench-marking indicators (using things like APP2SD where the card is frequently accessed).
There has been discussions on people noticing true class 10 speeds on their Skyrocket regarding PC to SGS2 transfer but for internal use, 6 should suffice (a true class 6, there are a lot of knock offs). I always used the rule of thumb that class = the MB/s and anything better, well don't brag about it because the class rating by the SD association only deals with the min speed and not the max.
Hi,
I have my SD card (class 6) merged with my internal storage. Every app I move to the SD card lags like hell! They work perfect when on the internal storage. My storage is starting to fill though as it's only an 8GB device. Any ideas? I've been thinking that if I get a class 3 uhc SD card (they reckon they're up to 60 MB/s) but I'm not sure is that the problem?
Thanks for your advice.
Class 10 should be bare minimum. I am pretty sure the class 6 card is the cause. Uhs 3 is recommended.
Broadcasted from Zeta Reticuli
I would concur with @Gravemind2015 your card is too slow... Although I think a minimum UHS1 card is required to make it usable due to the higher write speed than a Class 10, but I do agree a UHS3 is recommended.
A Class 6 card is just too slow for use as adopted storage, I would convert it back to portable until you can get a new card or it will constantly lag on you.
Thank you for your help
I've bought a UHS Class 3 card, installed it and it's solved the problem.
acejavelin said:
I would concur with @Gravemind2015 your card is too slow... Although I think a minimum UHS1 card is required to make it usable due to the higher write speed than a Class 10, but I do agree a UHS3 is recommended.
A Class 6 card is just too slow for use as adopted storage, I would convert it back to portable until you can get a new card or it will constantly lag on you.
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sir can i ask? i got same problem here, now i used sandisk micro SDHC UHS-I Class 10 16GB speed up to 48mb/s. but i still got lag, that laggy was from my phone or my sd card? if it cause by sd card, and than i'll buy UHS-3 class 10 speed up to 90mb/s. it will solved my laggy? i used Moto g4 plus 2/16 run with MM 6.0.1
jincuriki said:
sir can i ask? i got same problem here, now i used sandisk micro SDHC UHS-I Class 10 16GB speed up to 48mb/s. but i still got lag, that laggy was from my phone or my sd card? if it cause by sd card, and than i'll buy UHS-3 class 10 speed up to 90mb/s. it will solved my laggy? i used Moto g4 plus 2/16 run with MM 6.0.1
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The card reader in the 3rd and 4th generation G devices is UHS-1, it's write speed is limited in real world use is limited to about 45mbps, or about 1/2 to 1/3 of the embedded storage chip... You will always have some lag by comparison. Will a U3 card be better? I can't answer that definitively since it would vary based on your specific usage.