Western digital external. My book 20tb or whatever size works for you. I blew through a 12 and 16 filled with photos and videos…
USB 3 and portable; I use exfat as my friend keeps a copy at his house.
And I just rotate through 3. One at home one at work and one with my friend.
FreeFileSync to keep everything updated
The single best thing you can do security wise, is to NOT have any personal data on a web facing server.
Separate the data
Rereading it does look like you are doing the things right; so just audit what is on the public side. - your calendar and tasks- cool
Your photo and docs, do those need to be on there?
If they are on a server that is publicly accessible, please move them to a different location
Otherwise you sound like your doing well