EDIT: Ooh, crap. 68K is right; FAT32 won't handle that. How DID it get there? If you mean "over the network," no. The PS3 is a client for DNLA, (DLNA?) but not a file server. You can copy DLNA content ...
Quick question: if I have a USB drive with video files, how can I copy them to my PS3 har-drive? Do I just select 'copy' from the triangle menu, or will that just copy itself to the USB device?