I didin't tried this app, but i manually hex edited the files inside the pen...
Got interesting results, data0002 looks like it has everything i have (profile/saves and maybe themes no idea) duplicated in there, and i just made a partition inside the xbox 360, it has 0MB in it, but in fact all my saves althougth i didint copied them to the pen, they are duplicated in the pen, humm i can't figure is why M$ duplicates all our data and stays invisible for the xbox 360...
Data0001 doesnt look much important to me, it looks like it has only info of what type of partition u made inside the xbox360. Data0000 looks like it may be the one that has all the tests and info about the pen drive, because u probably can't use ppls data files in ur pen, although i didnt tested that yet, but i have one corsair 8gb pen that can't be used in the xbox360, and i dont think that if i move my data files from the other pen to my corsair it will load any good...
After comparing data0001 files(one with nothing inside the pen, one with a save in it), it just changed a very few bytes to mean anything, i hex edited data0001, and the save got danified, but i was still able to move it to the hdd and it got fixed, so i dont think data0001 is important...
Data0002+3+4+5... are the actual virtual hdd(and has all ur data duplicated from ur hdd even if u didint copied nothing to the pen...). But to discover bugs in the system and maybe let us hack the xbox360, data0000 looks like it's the one, and probably is encrypted...
Anyway i manually extracted my save from NFS trough usb, and compared to my actual save i have inside the hdd, both had a lot of different bytes, but still i saved the one inside the pen just like the real save i have in the hdd, then i sent it to my hdd over the pc, and it loads just fine, didint even needed to rehash it, the problem is the bloody hell save checksum is still there
(I was hoping since they have different data moving to the usb may remove the save checksum, but no it doesnt crapt on that)
So i can confirm M$ is so fckin stupid and didint encrypted, our data in the usb
ps: also xbox partition change the sectors of the pen it adds a "xbox360" and a few more bytes to the pen partition...
Keep Cool!