Syncthing provides a secure, decentralised solution for synchronising files across multiple devices without relying on cloud services, appealing to users seeking local control and privacy.
For people who move between several computers, keeping the same files available everywhere is often easiest with cloud storage. But there is another option for users who want the same convenience without placing a copy of their data in an online account. According to XDA Developers, Syncthing can keep a folder synchronised across multiple machines directly, so a change made on one computer is copied to the others without relying on a central cloud repository. Guides from PCWorld and self-hosted publications describe the same basic model: a peer-to-peer system built for direct device-to-device file transfer.
The practical appeal is straightforward. Each computer runs Syncthing locally and receives a unique device ID, then the user authorises the other machines and shares a chosen folder. Once that connection is in place, new files, edits and deletions are propagated between the devices that are online at the same time. XDA notes that the folder can be shared across macOS, Windows and Linux, while PCWorld and other technical guides emphasise the cross-platform nature of the software and its use of encrypted transfers between endpoints.
That design does not mean Syncthing never touches outside infrastructure. XDA explains that it may use discovery servers to help devices find one another, and relay servers if a direct connection cannot be made. However, the relayed traffic remains encrypted and the service does not store a separate copy of the files. The same source also says these features can be disabled for users who want synchronisation limited to a local network.
Setup is handled through a browser-based interface even though the files stay on the computer itself. Syncthing creates a default sync folder when it starts, but users can also point it at an existing directory and set the folder mode to send and receive. After pairing the remote device IDs and accepting the shared-folder invitation on each machine, the user chooses where the local copy should live. Because the folder identity is tracked internally, the paths do not need to match across operating systems, which makes mixed Mac, Windows and Linux setups easier to manage.
There are limits. XDA warns that Syncthing mirrors deletions as well as additions, so an accidental removal on one machine can spread to the others. That means a separate backup remains necessary if the files matter. The same article also suggests turning on file versioning to preserve older revisions, a precaution echoed in broader Syncthing guides that stress the importance of local control but also the need for sensible data protection. XDA further notes that file-name conflicts can arise between operating systems, particularly where case sensitivity differs, so consistent naming matters if the same folder is being shared across platforms.
For users who mainly want a shared working folder rather than remote access from anywhere, Syncthing offers a clear alternative to cloud services. It is especially useful for people who move screenshots, documents, PDFs, videos and other project files between several computers and prefer to keep that traffic under their own control. The trade-off is that synchronisation depends on at least two devices being online, and the system is best treated as a convenience layer rather than a substitute for backup.
Disclaimer: This content is intended for informational purposes only. Readers are advised to exercise their own judgement, conduct due diligence, or consult a qualified expert before acting on any information provided.
