[kevingadd]

Archival isn't piracy.

archive

place or store (something) in [a collection of historical documents or records providing information about a place, institution, or group of people]

If you were downloading roms in order to build your archive, that would be piracy, but the downloading roms is the issue there. One could argue that downloading roms is fine if you own the games in question as well, but I doubt anyone wants to test that in court.

[emodendroket]

Even if you’re talking about just ripping your own games, you are on uncertain legal footing if there is any DRM you have to circumvent to do it.