I just have a spreadsheet and then a folder for each firearm that includes the photos & paperwork scans. The pics aren't linked to the spreadsheet.
Isn't Lotus 1-2-3 closing in on C&R status itself?
And remember to test your backups regularly. Nothing like losing your data, then grabbing the backup and discovering it's corrupted!
Of note, I am truly NOT a conspiracy theorist whatsoever, but I also don't really trust cloud storage. Once you put it there, it's really not only yours anymore.
Apple, Microsoft, Google, Dropbox, and the other scumbags all explicitly state they scan your "cloud data" for files that violate their TOS and will delete them and report anything "illegal" they find.