To reduce the heat, look for a newer, more energy efficient computer. The i5-6500 is a 10 year old, 65 watt CPU. That’s probably not the best to run in a small closet without ventilation.

@cmnybo @DanKhramov Doesn't even need to be a newer CPU. I'm running Immich on an ancient dell laptop w/ i3-4010U. Not efficient in terms of CPU-per-watt these days, but that i3 chip isn't putting out much heat either.

As far as backups - snapraid sync runs nightly to ensure that accidental deletions or bitrot is caught. Restic backs up to a drive on a separate machine (in a different room of my house). I still need an off-site backup, but the hard drive shortages messed up my plans there..