Others have mentioned backup, I’m going to reiterate that.

Backup, backup, backup.

I have an (old) NAS that franky I don’t trust to not die. Then again, anything candidate, so it’s just one component of my data duplication.

I also have my server which is authoritative for all data, which is then duplicated (on schedules) to the NAS and 2 external drives, so I have 4 local copies.

All mobile devices sync important data to my server.

Power My NAS idles about 15w. It’s 5 drives, so honestly that’s quite low and tells us it spins down drives.

My server idles at 20w, using NVME as the boot drive, a large data drive, and an SSD for virtual machines.

Before this my server was an old gaming desktop that idled around 100w.