I have a micro SD card from Kingston - 32GB class 10
When i'm writing on it using usb card reader or my phone, average write speed is about 6MB/s
But after about 10GB of data written into it, transfer dramatically drops to 200Kb/s
I have tried formatting it with different allocation unit sizes, it doesn't make any difference
any ideas ?
additionally, when i use it filled above 10GB of data in my phone (taking pictures, listen music, using applications that write on it) files sometimes go missing
The limit seems to be not 10GB but about 8 300 000 000 bytes