Z; is usually mounted by WD Discovery which will not longer do that after ~June 2023 because WDD is End of Life and being deprecated.
This whole desktop sync business with WDD is likely to go away (desktop, not the mobile apps) so there is little to be gain by trying to troubleshoot something that won’t be around for a few more weeks from now.
All the ‘Syncthing’ links can be found by searching the subforum, one such link:
