Originally Posted by qhubekela

A mouse has no file system. Install 'ext-mou' for that.

and your flash drive.. are you sure it has a valid partition? N900 does not automount superblock. Quickest way to verify is ... when the light flashes on your usb drive, run '

Code:

dmesg | grep sd

..
If you have a partition, one of the lines will show something like 'sda1' ... if it's just 'sda', you don't have a valid partition there.