Back That Data Up
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Back That Data Up vs Carbon Copy Cloner
Carbon Copy Cloner has been the reference Mac cloning tool for over 20 years. Here is the honest picture of where CCC is still the right pick, and where BTDU adds features CCC does not include.
| Back That Data Up | Carbon Copy Cloner | |
|---|---|---|
| Price | $29.99 one-time | $49.95 + $30/year renewal |
| Local snapshots to any drive | ✓ | ✓ |
| Bootable clones (macOS 10.15 and earlier) | ✕ | ✓ |
| Cloud backup built in | ✓ | ✕ |
| Bring-your-own cloud (S3, Dropbox, etc.) | ✓ | ✕ |
| Post-quantum encryption on cloud uploads | ✓ | — |
| Hardware key (FIDO2 / Yubikey) unlock of vault | ✓ | ✕ |
| Ransomware anomaly detection | ✓ | ✕ |
| Verified restores every backup | ✓ | ✓ |
| Self-healing cloud vault | ✓ | — |
| Free updates for life of major version | ✓ | no ($30/yr renewal) |
✓ yes · ~ partial · ✕ no · — not applicable. Prices may change; verify before deciding.
About Carbon Copy Cloner
The reference Mac cloning tool for two decades
Carbon Copy Cloner has been made by Bombich Software since 2002. Mike Bombich's reputation in the Mac community is stellar and well-earned: careful engineering, deep documentation, thoughtful support. When someone asks "what's the best local Mac backup tool," CCC has been near the top of every answer for over two decades.
CCC's superpower is bootable clones (on macOS 10.15 and earlier) and block-level cloning. Its scheduling and trigger system is the most flexible in the category: back up when a specific drive mounts, when a specific app quits, on a schedule, on a condition. Task History gives you a rigorous view of what happened on each run. For anyone whose backup workflow requires deep local control, CCC is genuinely hard to beat.
The place BTDU adds features CCC does not is in the layers CCC deliberately does not cover: cloud backup, FIDO2 hardware key unlock, post-quantum encryption, and ransomware anomaly detection on the backup side.
The honest gaps
Where CCC's scope ends and BTDU keeps going
Carbon Copy Cloner is deliberately a local backup tool. These are the specific areas that scope leaves uncovered.
No cloud component at all. CCC clones to a drive. A drive sitting next to your Mac. One fire, one flood, one theft takes both at once. If you want offsite, CCC's official position is that you should use a different tool for that job. BTDU covers both local and offsite in one app: Cloud Vault targets your existing iCloud Drive, Dropbox, Google Drive, OneDrive, or S3-compatible endpoint.
No FIDO2 vault unlock. CCC's backup encryption is password only. If your password is compromised and someone has physical access to your clone drive, they have your files. BTDU supports optional FIDO2 unlock with any Yubikey / SoloKey / Feitian / Nitrokey, verified at the crypto envelope — an attacker with your drive still needs the physical key.
No ransomware anomaly detection. CCC will happily clone whatever is on the source drive on its next scheduled run. If ransomware ran between backups, CCC copies the encrypted version. You have to catch this at the "verify Task History looks right" step, which most people do not do daily. BTDU actively watches for mass encryption / deletion patterns and pauses backups before the compromised files can overwrite clean snapshots.
No post-quantum encryption anywhere. CCC's encryption is classical. For local-only backups that never leave your house, this is fine. For anyone who wants an offsite copy that stays opaque even against future quantum-capable attackers, CCC has no answer because CCC does not do cloud.
Recurring cost after year one. CCC is $49.95 for the app, plus $30 per year renewal to keep receiving updates. Skip the renewal and you keep the version you paid for, but new macOS releases can break older CCC versions. BTDU is $29.99 once and ships free updates for the life of the major version.
Back That Data Up
Built for the areas CCC deliberately does not cover
BTDU is not trying to out-clone Carbon Copy Cloner. CCC's block-level clone game is its own category and BTDU does not compete there. BTDU is built for the offsite, key-unlock, and ransomware-defense layers that CCC's scope does not include.
Cloud Vault built in
Back That Data Up ships an encrypted Cloud Vault that targets your own iCloud Drive, Dropbox, Google Drive, OneDrive, or any S3-compatible endpoint. Carbon Copy Cloner has no cloud component at all. A CCC-only setup means one flood, one fire, one theft takes both your Mac and your backup drive together. BTDU covers that offsite gap without a separate cloud subscription.
FIDO2 physical key unlock
Back That Data Up supports unlocking your vault with any FIDO2 security key (Yubikey, SoloKey, Feitian, Nitrokey). Multiple keys per vault so losing one does not lock you out. Key is verified at the crypto envelope, not just an app-launch UI gate. Carbon Copy Cloner encrypts backups with a password only. Password compromise + drive theft = your files.
Post-quantum encryption
For the cloud side, BTDU 1.1 uses X-Wing: X25519 combined with ML-KEM-768 (NIST post-quantum standard, FIPS 203) via Apple CryptoKit. Defends against store-now-decrypt-later. Carbon Copy Cloner does not encrypt to a cloud at all, so this comparison is not apples-to-apples, but it means CCC-only users are relying on the physical security of their local drive.
Ransomware anomaly detection
BTDU watches every backup for mass encryption or mass deletion patterns and pauses before your clean snapshots can be overwritten. Carbon Copy Cloner will faithfully clone whatever is on the source drive, encrypted payload included. If ransomware has already run before CCC's next scheduled backup fires, CCC will happily copy the encrypted version and can overwrite your last clean history.
On the local side, BTDU also does point-in-time snapshots to any drive macOS mounts. Each snapshot is independently readable and unchanged files are hardlinked for space efficiency. It is not a bootable clone (CCC's specialty on macOS 10.15 and earlier), but for the "restore my files" job on modern macOS it works the same way.
BTDU is sold as old-school software. You pay $29.99 once. Bug fixes and minor updates ship free for the life of the major version. No renewal fee, no subscription, and no account required to back up your own files.
The honest answer
Who should pick which
Stick with Carbon Copy Cloner if...
- → You need bootable clones (still relevant for macOS 10.15 and older workflows).
- → You have complex scheduling / trigger requirements (mount-based, app-based, condition-based) that CCC's task engine is exceptionally good at.
- → Local backup is all you need. You have offsite handled separately (Backblaze, iCloud, etc.) and are not looking to consolidate.
- → You are comfortable paying $30 per year for major-version updates.
Carbon Copy Cloner is a masterclass in Mac software. There is no shame in staying on it.
Consider BTDU if...
- → You want local snapshots AND encrypted cloud vault as first-class equals in one app, not two products stitched together.
- → You want FIDO2 physical key unlock on your backup vault, not just password encryption.
- → You work with files ransomware would be catastrophic for (client work, source code, years of photos) and want active anomaly detection.
- → You care about the store-now-decrypt-later threat and want post-quantum encryption on your offsite copy from day one.
- → You want to pay once and be done with it, no annual renewal.
Many people run CCC and BTDU together. CCC handles the bootable clone or the complex scheduled local jobs; BTDU handles the encrypted cloud vault, the FIDO2 vault unlock, and the ransomware anomaly detection. They are not competing for the same job.
If BTDU sounds like a fit for what you need, here is where to start. $29.99, one time. No subscription, ever.
Already running Carbon Copy Cloner? Good. BTDU installs alongside it without conflicts. Run both for the layers each does best.