The problem
Sync tools are built for documents.
They compare dates and copy without checking what arrived. With media, a silent corruption or a rename replayed as delete and copy costs hours.
How it works
The same feature set, rebuilt for large files.
Pick two folders, see what will be created, updated or deleted before anything moves, then sync. Every copied file is checked, renamed files are replayed as renames, and servers are reached over SFTP, FTP or FTPS.
Four sync modes
Two Ways, Mirror, Update or Custom.
Verified copies
Every file read back with xxHash64, or checked by the server itself.
Rename detection
A moved file is moved, never deleted and copied back.
Disks, shares and servers
Local, network, SFTP, FTP and FTPS, in the same job.
Scheduled sync
The folder that has to stay current, kept current on its own.
When it finishes
A push on your phone, then quit, sleep or shut down.
The competition
Where it stands.
| syncto | FreeFileSync | ChronoSync | |
|---|---|---|---|
| macOS and Windows | Linux too | macOS only | |
| Content check after every copy | Every file | Hidden setting, off by default | |
| Push on your phone when a job ends | E‑mail, paid editions | With its iPhone app | |
| Sleep or shut down when done | Script only | ||
| Price | Free, open source | Free for private use, €20 per business device | $49.99 per Mac |
FreeFileSync is the reference syncto takes its feature set from. syncto adds the ingesto interface, a check of every copied file, and servers over SFTP, FTP and FTPS.