Am preparing to transfer files from my xp to new puter 7. Never done this before. Am looking at videos etc to learn how. My question: after transferring (copying) the files to the new machine, can I remove the files from my flash drive?

I am starting with just a few until I get familiar with it. I have a 4 gig flash but don't know if that will be enough if I have to retain all the files I transfer.

Thanks...

Marico