I spent a lot of time during the last year digitizing family slides and negatives, and organizing them. I left the slides in their "carousals" or the original slide boxes and the negatives I put into Print File archival negative preservers. My question is about the negatives in their archival sleeves: How to best store them? Chances are they will not be seen again until my children are going through my belongings after I depart, hoping that's a LOONG time, decades I expect. Right now I have them nestled in hanging folders in a file drawer, but would something else be better, eg a three ring binder, or laying flat in a large sealed Rubbermaid or Tupperware container? Some of these negatives are over 60 years old. They were kept in their original preservers that came from drugstores and occasional camera shops or fast processing labs like Wolf Photo. Actually that kept them very well. They were always in climate controlled areas of my house. I appreciate any feedback and suggestions.