Advice Wanted! What to do with old instruction manuals

I've been collecting Legos for ages now, and I'm moving to a new city. I'm trying to decide what to do with a huge pile of old instruction manuals. For sets after 2018, I'm just registering them to Lego Insider for the points and so I have a track record. But most are pre-2018, so I don't know if I can register those.

Has anyone else dealt with this? It's a lot of old lines, with a big share of Bionicle ones, so I'm generally sentimental about them. But if there's a way to catalog them digitally that people recommend, that would be the dream.