Archivists regard tapes as more stable than digitized formats or CDs.

Digital data needs to be 'migrated' at regular intervals and if the original format is 'lossy' there will be losses each time. There is also the issue of reading/playing devices and software. CDs' estimated life is only 5-10 years (yes, we all might know they can last longer, but the archival view is that they are less stable than books).

If you make boxes, investigate quality of the cardboard, tape, and glue.