Saving All Those Pictures

Like many of the rest of you probably get, I get many, many pictures,cards, etc. from my students!But I want to keep them all! But how?....
The solution! Grab a flashdrive and scan them all in there. I do ths after they have hung up a while and then can throw away originals after scanned. So far its worked great! Also do this with any composition,art,work, etc. of theirs that I want to keep a copy!