I make "work prints" and final "fine prints." Fine prints (i.e., ones that I would mat, frame and sell) get stored in boxes. I store one print each of the fine prints in grey museum quality boxes about two inches deep until I get around to matting them. Back-up prints and work prints get stored in regular paper boxes, with a list of what's inside taped to the top of the box. For these latter, I add a sheet of interleaving paper at each end of the stack to protect the prints from the cardboard. I number and label the boxes and cross-reference the contents with my print storage log in the computer so I can find any specific print easily if I need to mat one or if I want to revisit it for later printing.
All the prints that end up on mats get copy photographed and stored in the computer as well.
Best,
Doremus