Regarding the Acmee MF-01 I noticed it can be chardged and used at the same time. I'ts probably just me that for some reason thaught i had to power it off to connect it to the charger... 
I also noticed that it now shows up in Windows (7) but it detects as unknown device no matter what mass storage drivers i try... I know it's not supposed to work as a thumb drive/mass storage but you never know. If I set it to USB DAC it shows up as it should but only in 16-bit mode. No 24bit over USB as it seems.

I also noticed that it now shows up in Windows (7) but it detects as unknown device no matter what mass storage drivers i try... I know it's not supposed to work as a thumb drive/mass storage but you never know. If I set it to USB DAC it shows up as it should but only in 16-bit mode. No 24bit over USB as it seems.