- Buy a portable wi-fi router with file sharing such as MOCREO 5-in-1 Portable WiFi (not personally vouching for this one it just happens to be the one I have and it cost less than the Apple connection cables).
- Plug your USB stick into the router
- Connect your phone via wi-fi to the router.
- Log into the routers built in file managment or use any FTP capable app to connect (GoodReader, ifiles, etc)
- Transfer files.