Hi,
I have a file which has to be shared between three pcs. All three pcs can make changes to it, how syncthing handle this ? Is the modification time that syncthing uses has reference ?
Not necessarily the time (as it may be wrongly set in the OS or impacted by the filesystem, time zone changes, etc.), but the last change as detected by Syncthing. Please see also https://docs.syncthing.net/users/syncing#conflicting-changes.
The modification time is still important though, as a change to it is required to trigger a scan or to rehash a file. This has been an issue, e.g. with encrypted containers that are set not to change their original modification time.
ok, they will probably never be modified simultaneously