Renaming files and folders

I still have no idea about how scripting could improve the situation and how exactly this would need to be done.

Whatever, I found this:

And this involves manually renaming files and folders on local and remote devices.

I cannot do this.

All remote devices are not mine and I have no access beside what Syncthing offers locally. So I can only pause the folder at the local side or the remote device itself.

Does this help in renaming? How to handle this best?