I had a similar experience last night.
I tried to create a folder called ADE in ROOT and it created the folder ok but it created another in a subfolder off ROOT, like this - LIVE\ADE.
So I ended up with 2 copies of the folder, one in ROOT and the other in ROOT\LIVE\. Both suggesting they had the same contents.
Then, lots of Samples / Programs and Sequences I tried to access kept returning "SYSTEM ERROR".
I manged to get most of the content back off to the PC via the USB, but I lost the LIVE folder and the ADE folder. And considering the amount of time I spent setting up the LIVE Sequence, I'm well pissed off.
Considering the "Rock Solid" title that the MPC's are sold under I feel slightly gutted to say the least.
And yes, this is with the latest OS.
So I've reformatted the disk, done the OS again and reformatted afterwards as well. Spent hours copying it all back on again and now right back to where I started about 1 week ago!
I'm gonna be backin up every week to the PC now, so hopefully that will stop this from becoming an issue, but if anyone can tell me if these are problems that everyone is dealing with I'd like to know.
I actually brought this to get rid of the PC and Windows enviroment but it looks like I can't rely on Akai OS and Microsofts seems more stable?????? Arghhhhhh.