Had a scare last week. Lightroom catalog wouldn't open after the power dropped out while I was in the middle of an import, and for about twenty minutes I figured I'd lost three years of edits. Turned out the automatic catalog backup had a copy from the day before, so no harm done, but it got me thinking.
Current setup FWIW: raws on a 4TB external, catalog on the laptop, and Lightroom backs the catalog up weekly to that same external drive. Which I now realize means if that one drive goes, everything goes. Raws are around 1.6TB, mostly D850 and Z8 files of birds that all look the same to my wife.
What's a sensible setup for a retired fella who isn't going to run a server? Cloud, a second drive at my daughter's, both? IMHO the 3-2-1 thing sounds great right up until you try to actually do it.
- Walt