Originally Posted by connectandroid
Just got my 64GB Sandisk Micro-SDXC Ultra transferring data from my old 16GB Sandisk Micro SDHC... pretty slow on writes speeds compared to 16GB card but makes up for it capacity.
When you used as mass storage mode and trying to transfer files into it. It only get 4mb/s. When it used for internal transfer between SD card and extra SD card within phone. I can have 10mb/s on my Sandisk cl10 64GB card as shown. I can't moved applications into extra SD card, prompted no enough space.