3-2-1 quickly:
- Local: Plug a 2TB SSD; enable Time Machine with hourly backups.
- Cloud: Backblaze or iDrive; exclude large caches to save bandwidth.
- Off-site: Clone with Carbon Copy Cloner to a second drive monthly; store off-site.
- Test: Restore a random folder monthly to verify.
- Power: For laptops, keep it on power during first backup; it’s heavy.
Now you’re covered for drive failure, theft, and “oops deleted it.”