Backup is your most important defense against data loss. No recovery service can replace a good backup strategy. Here's how to do it right.
The 3-2-1 Backup Rule
This is the gold standard for data protection:
- 3 copies: Your original data + 2 backups
- 2 different media: Local drive + cloud, or internal + external
- 1 offsite: At least one copy in a different location
Backup Methods
1. External Hard Drive Backup
- Fast and inexpensive for large amounts of data
- Use built-in tools: Windows Backup, macOS Time Machine
- Keep the backup drive disconnected when not in use (protects from ransomware)
- Replace backup drives every 3-5 years
2. Cloud Backup
- Automatic offsite protection
- Services: Backblaze, Carbonite, iDrive, Google Drive, OneDrive
- Protects against fire, theft, flood — anything that affects your location
- Monthly subscription cost but invaluable protection
3. NAS (Network Attached Storage)
- Central backup for multiple computers on your network
- RAID provides drive failure protection
- Many NAS devices can also sync to cloud backup
- Good for businesses and power users
What to Back Up
- Documents: Work files, tax records, contracts
- Photos and videos: Often irreplaceable
- Email archives: Important correspondence
- Application data: Databases, project files
- System image: Complete OS backup for quick restore
Backup Schedule
- Critical files: Real-time or daily
- Personal files: Weekly minimum
- Full system image: Monthly
- Verify backups: Test restore quarterly
Common Backup Mistakes
- Only having one backup (no redundancy)
- Keeping backup drive connected 24/7 (ransomware risk)
- Never testing if backups can be restored
- Backing up to the same physical drive
- Assuming cloud sync = backup (it doesn't — deletions sync too)