Android: Change sync folder location

[larsv]

I have multiple Android devices that place photos in the DCIM folder.
I would like them all to contribute to the same synced DCIM folder.
My Android devices would do selective sync on the DCIM folder, whereas my Windows desktop would sync all files.
This way I would get files from all my devices to my desktop.

Today that doesn't seem possible. On the first device I can select the DCIM folder to sync, but all other devices will create a new DCIM folder under the default location, not under the Android root of the device storage. 

So my request is that, just like on Windows, you can change the location of an existing, syncing folder.
Or, when you connect an existing folder, you can specify the location.

My current solution to do this is OneDrive, and there are of course a number of reasons why that cloud sync is not an ideal solution.

Thanks.