I use both paper and computer records, for obvious reasons. As the various papers, articles, clippings etc got to be a lot, it filled two small (two drawer) filing cabinets, which are supposed to be organized by states but are in fact quite mixed. Saving things on computer demands that you make up a CD or floppy discs (which would take many) or run the risk of losing everything if your computer crashes. I would suggest scanning any rare maps or photographs/drawings and save the scans as JPG files too - better safe than sorry.
For magazines I like the plastic rack holders that will fit about a year's worth in each one, and then can be labeled and put in your book case. Maps are best kept ROLLED and never folded, so we made up map holders from plastic drain pipe with caps - one glued on, one screwed on. A cheaper method is to make a map file out of wood, drill/cut a series of holes in it and set up a matching board at a distance spaced to fit the length of your maps. I plan to make up one like this for the library room when I get to that part of building our place here.
Good luck and good hunting, I hope you find the treasures that you seek.
Oroblanco