Hyperkin 10 Cartridge Holder Storage Stand for Nintendo 64 Games, [2-Pack] Stackable Retro Game Organizer for N64 Collectors

I personally would use a few of these: https://a.co/d/0djox3n3 And get these: https://www.etsy.com/listing/1293327945/n64-cartridge-top-end-labels-deluxe-set?ref=share_ios_native_control To label the tops so you can see which is which.

https://a.co/d/01PPlfTs Here you get 2 it holds 20 games