I have a 4gig flash drive that I wanted to install BT4 Final to. The video walk-through on the offensive-security site says minimum 2 gigs/recommended 4, but some other people have told me that 4 is pushing it and I should go buy an 8 gig drive.

Will I be ok on a 4 gig? I don't need to save any huge files when using BT, I would just like to be able to keep my preferences and that sort of thing. I know this seems stupid because I can go buy an 8 gig drive for $25 and be done with it, but I'm in college and generally have less than 50 bucks to my name on any given day. I have to work with whatever hardware I can scavenge.