If your wanting to transfer to a USB drive then Launch Elf is the key... or go commercially and get CodeBreaker 8.0 (or higher) or AR MAX (or evo... blah blah blah...)
I have all three... I use CB and AR MAX mostly. Used for getting save to others and off the net and backing up to my PC....
PS3 Slim 320GB
PS2 v11 exploit w/300GB Maxtor
PS2 v10 exploit w/80GB Samsung - Network Games
PS2 v10 exploit w/60GB Samsung - Network Games
PSP 1001 3.52M33 w/10GB total storage
NDS DSReal 4GB