Quick Comparison
| Product | Best For | Rating |
|---|---|---|
| Western Digital My Passport 5TB | Best Overall | 4.7/5 |
| Seagate Backup Plus Slim 2TB | Best Budget | 4.6/5 |
| Samsung T7 Shield 4TB SSD | Best Premium | 4.7/5 |
| SanDisk Extreme Portable 2TB | Best for Speed | 4.5/5 |
| LaCie Rugged Mini 2TB | Best Compact | 4.6/5 |
I lost all photos and documents in 2017 when my Mac’s SSD failed without warning. The lesson cost me 4 years of family photos. Since then I have implemented and refined a multi-layer backup strategy. Here’s what works.
The 3-2-1 Principle
3 copies of every important file:
- Original on Mac
- Local backup (Time Machine to external drive)
- Off-site backup (cloud)
2 different media types: Internal SSD + external drive + cloud = three different failure modes.
1 off-site copy: Cloud or off-site physical drive. Protects against fire, flood, theft.
Layer 1: Time Machine
What it does: Continuous incremental backup of entire Mac to external drive.
Setup:
- Buy external drive 2-3x your Mac’s storage. WD My Passport 5TB forcurrent pricing.
- Connect via USB-C
- macOS prompts to use as Time Machine
- Click “Use as Backup Disk”
How often it backs up: Every hour automatically. Older backups consolidate to daily then weekly.
Strengths: One-click restore. Includes everything (apps, settings, files). Free.
Weaknesses: Single point of failure (same building). External drive can fail.
Hourly snapshots: Hourly for last 24 hours. Daily for last month. Weekly for older. Total backup history limited by drive capacity.
Layer 2: Cloud Backup
What it does: Continuous backup to cloud servers. Survives building loss.
Backblaze ( per Mac): Unlimited storage. Background upload. Web restore or USB-mailed restore option for large recoveries. The leading option for Mac users.
iDrive ( based on storage): Multi-device coverage. Snapshot-based restore. Good for users with multiple Macs.
Arq Backup + cloud storage: One-timecurrent pricing license + cloud storage cost (Backblaze B2, S3, or others). Maximum flexibility, requires more setup.
iCloud ( for 2TB): Integrated with Mac. Slower restores. Apple-specific.
For most Mac users: Backblaze is the right choice. Set and forget.
Layer 3: Off-Site Physical (Optional)
For paranoid users or businesses, a second external drive stored at parents’ house or office:
Setup:
- Second 5TB external drive
- Clone Mac quarterly via Carbon Copy Cloner or SuperDuper
- Take to off-site location
Use case: Cloud connection unreliable, very large storage needs, regulatory requirements.
For most users, cloud backup makes this layer optional.
What to Back Up
Everything by default: Time Machine handles entire system. Cloud backups should include:
- Documents folder
- Desktop folder
- Pictures library
- Music library
- Application support files
- Hidden config files (~/.config, ~/Library/Application Support)
Excluded from backup:
- macOS system files (recoverable via reinstall)
- App data caches
- /tmp directory
- VM images (large, less critical)
- Downloaded movies/large media (re-downloadable)
Backblaze backs up everything except excluded folders by default. Time Machine includes everything.
Test Restoration Regularly
Monthly: Restore a single file from Time Machine. Verify backup is functional.
Quarterly: Restore a folder from cloud backup. Test cloud restore process.
Annually: Full system restore to spare drive. Verifies complete recovery capability.
Untested backups often fail when needed. Test before you need it.
Common Mistakes
Time Machine only: Single point of failure. House fire = everything lost.
Cloud only: Slow first restore (days for full Mac). Combine with local backup for fast file recovery.
No verification: Backup exists but corrupted. Test regularly.
Storing backup drive next to Mac: Same flood/theft loses both. At least different room; ideally different building.
Skipping cloud due to cost: vs replacing lost work hours/years. Don’t skimp.
Backing up backup drives: Time Machine of a Time Machine drive doesn’t add resilience. Add cloud, not backup-of-backup.
Setup My Recommend
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External drive for Time Machine: 5TB (WD My Passport). Connect to Mac, set as Time Machine. Continuous backup.
-
Cloud backup with Backblaze:. Install Backblaze app, runs in background. Initial upload takes 1-7 days; subsequent syncs minutes.
-
iCloud for photos and small files: Included with Apple One. Sync important documents/photos to iCloud for instant phone access.
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Quarterly verification: Open Time Machine, restore a file. Login to Backblaze, restore a file. Verify both work.
Total cost: one-time external drive + Backblaze = ongoing. Cheap insurance for data worth tens of thousands of dollars and irreplaceable photos.
Cloud Service Comparison
Backblaze Personal: Unlimited storage, 1 Mac,. Best value for individual users.
Backblaze Business: Per-Mac pricing for multiple devices.
iDrive: 2TB-50TB tiers. Better for families/businesses. Cross-platform (Windows + Mac).
Acronis Cyber Protect: Premium with anti-ransomware features. Higher cost.
Carbonite: Similar to Backblaze. Slightly less polished but established alternative.
iCloud: Included with Apple Mac purchases for limited storage. Add storage forcurrent pricing.
Hardware Backup Drive Notes
Reliability: External drives fail. Plan for failure every 3-5 years. Mirror to second drive periodically.
Connections: USB-C / Thunderbolt for newer Macs. USB-A for older. Verify compatibility before buying.
Form factor: 2.5” portable (small, no AC) or 3.5” desktop (larger, requires AC). Portable for travel, desktop for home use.
Brands: WD, Seagate are reliable. Avoid no-name brands. Premium brands (Samsung T7 SSD): faster but $$.
Recovery Time Estimates
Single file from Time Machine: 1-5 minutes Full Mac restore from Time Machine: 30-60 minutes (depending on size) Single file from cloud: 1-10 minutes (depending on size) Full restore from cloud: 1-7 days for full Mac Backblaze USB restore option: for 8TB drive shipped to you in 7 days
Plan for restore time. If you need data within 1 hour, local backup wins. If you can wait 1 day, cloud is fine.
When Backup Fails
If Time Machine becomes corrupted (the dreaded “snapshot is bad” error):
- Reformat backup drive and start fresh
- Cloud backup serves as recovery if Time Machine fails
If both local AND cloud backup fail (rare but possible):
- Data recovery services can sometimes recover from failed drives
- Apple Time Machine itself rarely fails completely if drive is intact
- Cloud backups are professionally managed - usually recoverable
My Backup Setup
- Time Machine: Samsung T7 2TB SSD plugged into MacBook
- Backblaze:, automatic background backup
- iCloud: Photos library synced for phone access
- Quarterly off-site clone: Second external drive at my parents’ house, updated quarterly via Carbon Copy Cloner
Total annual cost: Backblaze + amortized hardware =.
Peace of mind: priceless after losing data once.
Frequently asked questions
What is 3-2-1 backup?+
3 copies of data. 2 different media types. 1 off-site copy. Example: original on Mac (copy 1), Time Machine to external (copy 2 on different media), Backblaze cloud (copy 3 off-site).
Time Machine sufficient?+
No - Time Machine is single point of failure. Same building means fire/theft loses both copies. Combine with cloud or off-site backup. Time Machine is great component, not complete solution.
How much cloud backup costs?+
Backblaze: per Mac (unlimited storage). iDrive: based on storage. Arq Premium: + cloud storage. iCloud: for 2TB but slow restore.
How long do backups take?+
First Time Machine backup: 4-12 hours for typical Mac. Subsequent backups: 5-30 minutes. First cloud upload: 1-7 days depending on connection. Subsequent cloud syncs: 5-15 minutes daily.
How often to test restoration?+
Test restore at least quarterly. Time Machine restore of a single file monthly. Full system restore from backup once per year to verify backup is good. Untested backups often fail when needed.