3-2-1 Backup Strategy
Three copies, two media types, one offsite. The rule that prevents total data loss.
Three copies, two media types, one offsite, household data that survives a stolen laptop or dead drive.
How to set up 3-2-1 Backup Strategy
Three copies, two media types, one offsite, household data that survives a stolen laptop or dead drive.
- Time
- 20–30 min
- Difficulty
- Easy
- Verified
- 2026-06-22
Before you start
- List what matters: photos, documents, passwords vault, budget files
- One external USB drive
- Trusted offsite destination (relative, safe deposit, encrypted cloud)
Copy 1, live data
Files on laptop/phone/NAS you use daily. This copy is at risk every day, that's why you need 2 and 3.
Copy 2, local backup
External drive + FreeFileSync scheduled weekly for Documents, Photos export, password vault export, budget .db.
Copy 3, offsite
Monthly USB swap to parent's house OR encrypted cloud sync of critical folders only, not your entire downloads folder.
Test restore
Once a year: pull one file from offsite copy on a different computer. Untested backup is faith.
Label and calendar
Sticker drives with date. Calendar recurring Backup Sunday 15 minutes.
Troubleshooting
- Backup drive full
- Photos dominate, archive old years to second drive labeled Archive 2024.
- Never remember to run sync
- Automate FreeFileSync; keep drive plugged into home server not laptop.
- Ransomware fear
- Offline rotation, unplug drive when not syncing; cloud copy immutable if provider supports.
Keep it working
- After major life events (baby, home buy) re-audit what matters
- Encrypt offsite cloud bucket
- NAS is not backup without second destination
Browse related categories
Best for
- Family photo protection
- Anyone scared of losing phone pictures
- Simple backup planning
Can replace
Only backing up to iCloud or Google, Losing everything if one drive fails
Caveats
- Initial setup takes a weekend; offsite copy means giving a drive to a trusted relative.
- People wanting zero-thought automatic cloud only
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