Question regarding nested folders

For one particular use case in my setup, there are three devices, SERVER, DESKTOP, and LAPTOP. There is a particular portable application (with an unusually large footprint for a portable app) I use on both DESKTOP and LAPTOP, which I sync settings between already. I would also like to sync the entire app folder from DESKTOP on SERVER for backup purposes; no changes are ever expected to be made on SERVER’s end.

The relevant folder structure is:

PARENTFOLDER
|-SUBFOLDER1
|-SUBFOLDER2
--other subfolders

DESKTOP and LAPTOP already share SUBFOLDER1 and SUBFOLDER2 without issue.

I want to share PARENTFOLDER between DESKTOP and SERVER. I’ve manually done an initial copy and created PARENTFOLDER on both (without enabling sharing); two files fewer show on SERVER after the initial scan (presumably the two .stfolder files identifying SUBFOLDER1 and SUBFOLDER2?).

Is this going to work as intended, or am I overlooking a landmine?

Based on the proposed setup, it’ll work since PARENTFOLDER sounds like it’s only being mirrored by Syncthing between DESKTOP and SERVER.

Where things can go badly is when PARENTFOLDER is synced between DESKTOP and LAPTOP because they already share subfolders under PARENTFOLDER.

Having said all of that…

If mirroring PARENTFOLDER to SERVER is the only source of redundancy, you’ll have to weigh the risks of Syncthing also replicating accidental deletions, malware, file corruption, plus any other mishaps that can occur.

Thanks - that answers my question.

I’m following your note as well - this is being used more as a convenience backup in case of hardware failure in the desktop. 100% agree that protection against various forms of stupidity (either user-caused or otherwise) requires robust backup solutions, but this isn’t a critical application.