FreeFileSync Forum

Sorry for the poor translation.
If my configuration looks like this, then the synchronizer is waiting for ALL the disks to appear (access) on the left. (these are DVDs). And it doesn't start copying to the right until it has access to all four disks.

https://prnt.sc/14vxbg3

If you make 4 separate ...

One-way synchronization is configured (from left to right) for 4 disks. Each of which puts all the new files in separate folders (since it is impossible to synchronize multiple sources with one gettelm, the blocking file interferes).
And I often see how the Real Time Sync application does not start ...