• After 15+ years, we've made a big change: Android Forums is now Early Bird Club. Learn more here.

sd card speed problem

my galaxy s4 is from Bulgaria Globul. I bought microSDHC card adata premier - Premier microSDHC/SDXC UHS-I Class10_Memory Cards_ADATA Technology this one.
Here is the speed charts - Charts, benchmarks SD Cards 2014, [2] Sequential Write [MB/s] - its almost 20mb/s.
My card is much much slower than this. I bought it from very trusted shop in my town so its impossible to be fake. The write speed when I write mp3 files (4mb avg) is 4mb/s when I copy through cable (from pc to the phone's sdcard). When I write directly to the sd card with card reader its 8mb/s. So what happens? Is anybody have the same problem? Is it normal when I use cable the speed to be slower than with card reader. Why the speed is at least 2 times slower than in tests? (the card is formated in fat32).
 
I think you will find its the card reader in the phone its self.
I have a 64gb class 10 sandisk card & i find it is much faster in a card reader than the phone
 
My experience is exactly the same. Using the card in a USB card reader on my computer is much faster than connecting the computer to the phone with the card in it.

I've never measured it but double the speeds seems about right.
 
Back
Top Bottom