Your Mac is copy one.
iCloud is copy two.
ThirdCopy is the one you never have to think about — continuous, self-healing backups to your NAS or external drive, from a quiet little menu bar app.
Free 14-day trial · then $19.99 once · no subscription
●Set up in a minute
Pick folders, pick a destination, done. No jargon, no manuals, no “sync tasks.”
●Backs up as you work
Changes are mirrored within seconds. Prefer a schedule? Hourly, daily, weekly — your call.
●Heals itself
If the backup is damaged or edited, ThirdCopy notices and repairs it — automatically.
●One direction. No surprises.
A true mirror: what you add is copied, what you delete is removed. A stale backup can never overwrite your real files.
●iCloud-savvy
“On demand” files are fetched, backed up, and returned to the cloud — your disk space stays free.
●Always honest
Glanceable status, live progress, and plain-language reasons when something can’t run. Never a silent skip.
How it works
- Pick your folders. Documents, Desktop, Pictures — whatever matters.
- Pick where the backup lives. Any NAS share, external disk, or local folder.
- That’s it. ThirdCopy watches, mirrors, verifies, and heals — and tells you plainly if anything ever needs you.
Simple pricing
Free trial
Every feature, free for 14 days. No account, no card.
ThirdCopy Forever
One purchase. Yours for good. No subscription — less than half the price of the big sync suites.
Questions
Is ThirdCopy a subscription?
No. Free download, full-featured 14-day trial, then a single one-time purchase of $19.99. No subscription, ever.
Does it work with my NAS?
Yes — any mounted network share (SMB/AFP): Synology, QNAP, UGREEN, TrueNAS, or a plain shared folder on another machine. Local and external drives too.
What about iCloud “on demand” files?
They’re downloaded just long enough to back up, then returned to the cloud — your disk space stays free.
Is my data private?
Your files never leave your Mac except to the destination you choose. No servers, no accounts, no sign-in. Sandboxed, and only the folders you grant.
Which macOS versions?
macOS 14 Sonoma and later — with the full Liquid Glass look on macOS 26.
What happens when the trial ends?
Backups pause until you unlock. Your existing backup and settings are untouched.