i'm using my nano to transfer files across from a pc to a mac. i fill it up from the pc, plug into the mac, copy files off, then to empty the ipod for a refill i select the files and press option-delete - they disappear, but when i plug back into the pc and try to copy files onto it, it tells me there's no space - to get round that, i've been reformatting the nano each time. but surely i should be able to delete the files without reformatting each time..?
also, when i reformat, the first time it told me the capacity of the nano was 3.9 gigs, next time it told me 3.8, then 3.73 - why's that? (i think it was those three figures i got, it definitely changed and got lower anyway)