Our daughter has always been a prolific artist.. It would have been impossible to save it all.
She is actually a Studio Art Major in College now(Sculpture, LARGE Sculptures).
So of course I would have her edit her work at the end of each school year.. Some of them we gave to relatives in frames, some of them I made copies of and turned them into her stationary. And some I scanned or Digitally photographed..
This seemed to help to be able to" Lose" some of that work. I went through when she was not home and tossed some myself. I also have always warned her, When she moves into her apt.. all of this will be going with her..