i found a difference which might be helpful in finding a OS independent way of reformatting the device:
- when looked on the drive info itself the model is reported as "Linux File-Stor Gadget" (instead of hardware manufacturer namestring)
- the partition table type is reported as "loop" in contrary to the usual "msdos"
- the internal drive can't be mounted,when the device is off (in contrary to a lot of other usb-storage mountable gadgets like mp3 players which even have to be off when mounted)
this leads me to folowing assumption:
what we see as "internal drive" is in fact a "virtual drive" created by the readers system. that is why conventional formatting attempts fail
the gparted screenshot is attached.
I'm not going to make a test-format (and maybe a flash session) now, since i do not have a win7 box @ hand (ATM) should it fail.
But someone in
NEED might to
try following steps (after getting gparted of course:
http://gparted.sourceforge.net/download.php) in case of Linux-users: use your distros repository
- select the right drive (size of 300 something MiB is your hint)
- choose "create partition table" under menupoint "Drive"
- in the option "extended" there is "loop" to choose from
- choose "format as > fat(16 or 32) under menupoint "Partition"
- click on "Apply"
and hope it works
would be very happy about reports, in the meantime i'll try to find out additional facts altough I believe an enlightning word

from the factory guys or firmware gurus 'd be better than my shots in the dark.