Hi, I have encountered similar problems recently with SanDisk memory zone.
I bought SanDisk Ultra Dual Drive m3.0 - 64GB, formatted it with default settings ex-FAT, etc. and started to use it, well it is slow and heats up easily whilst droping write speed 
that’s normal probably…
Well the issue is, that on my Lenovo Vibe X3 smartfone the dual drive is recognized and I can read and write file to/from but in memory zone, under SanDisk Dual Ultra Drive it says - ‘device not supported’.
Is there a solution to this issue?
The above mentioned memory zone re-install or drive formatting is not solving this.
THX
