After installation, you need to format your USB like a Floppy. (Normally 100 disk in a USB), and select the "disk" in your USB with front buttons in your device.
For this, you hace a "UFloppyManagerII-ABB" software.
For Windows 7:
http://search.abb.com/library/…ntpartid=&action=synopsis
For Windows XP
http://search.abb.com/library/…ntpartid=&action=synopsis
Sometimes i have a problems with this software. You can check KETRON Software.
http://www.ketron.it/software/…y/usb-floppy-software-1-1
Yes, i know. It's a italian software for Midi Music, but it work!