Some people like the Print File pages. I never did in the smaller formats and I really don't like them for large format negatives. The negative has too much of a chance to be scratched during insertion and removal from the pages. I have been using the Interleaving Folders and Envelopes from Light Impressions for my 4x5, 5x7 and 8x10 negatives since about 1990. I wish they made them in 11x14 and 8x20 sizes also.
Balanced Seam Envelopes