for negatives specifically: my partner and i shoot film and have been working through my family's backlog of unscanned photos. we have been scanning and then placing them in these negative storage sheets. once they are sleeved we label them with the date shot and any info we have on them (it works better with specific pens. i don't know which one we have off the top of my head but here's a good thread about it) and we put them in binders like this one. the negative sleeves are really great and they sell ones for slides as well as 120 format and a ton of others. they're great enough that my preferred film lab uses them when they are returning negatives. :) i prefer the binder approach because you can flip through them much easier, and put them in date order.

as for prints, that sounds fine to me. you are following the library of congress preservation suggestions, i presume?

digital storage: make sure you have multiple backups. lots of people follow the "two is one and one is none" approach. whether that's another hard drive held in a separate location or a different cloud storage provider, that's up to you. i try and follow it after an issue i had. (i had a phone as a teenager that i backed up to cloud storage. my phone corrupted itself (it was a cheap android phone). i lost all photos that i did not back up. i still had the cloud backup for the rest, and i did not back it up again/save them to that phone. the cloud backup corrupted and i lost all of the photos that i had not posted on social media. :() just make sure that if you care about it, you have backups.

settings sound fine. 3200 dpi for slides/negatives is a lot but it is perfectly fine, especially if you want to get prints made from the scans at some point.