Baseball card holders (like most people) and found the niftiest binder at Stapes. I'd scan it BUT MY SCANNER hit the pc landfill last night

The binder closes like a "briefcase or suitcase" so even if stuff falls out, it stays contained.
Hold pre-punched pages... is about 1 1/2" thick so stacks and stores neatly. It also has a clear cover that I can slip a label on binder and full sheet of "whatever" (like my "neeeeeeed" list) for quick recognition when grabbing the right binder. (I have them in 3 colors )

An example of BAAAAAAAAAAAD_SCANNER