Problem creating backups on a network share

Hey

New user here. I have some problems with my backups.
I’m running the system in a VM. I have created a network storage entry that connects to my unraid server. If the entry is set to share then I can browse the share and everything works fine. I can’t use it for backups though (I have no option to do so).

If I try and set the usage to backup I get this in the logs:
2025-02-24 13:22:30.793 ERROR (MainThread) [supervisor.backups.manager] Backup 72ee40ee error
Traceback (most recent call last):
File “/usr/src/supervisor/supervisor/backups/manager.py”, line 472, in _do_backup
async with backup.create():
~~~~~~~~~~~~~^^
File “/usr/local/lib/python3.13/contextlib.py”, line 214, in aenter
return await anext(self.gen)
^^^^^^^^^^^^^^^^^^^^^
File “/usr/src/supervisor/supervisor/backups/backup.py”, line 481, in create
with self._outer_secure_tarfile as outer_tarfile:
^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/local/lib/python3.13/site-packages/securetar/init.py”, line 157, in enter
self._tar = tarfile.open(
~~~~~~~~~~~~^
name=str(self._name),
^^^^^^^^^^^^^^^^^^^^^
…<4 lines>…
**({“fileobj”: self._fileobj} if self._fileobj else {}),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File “/usr/local/lib/python3.13/tarfile.py”, line 1878, in open
return func(name, filemode, fileobj, **kwargs)
File “/usr/local/lib/python3.13/tarfile.py”, line 1910, in taropen
return cls(name, mode, fileobj, **kwargs)
File “/usr/local/lib/python3.13/tarfile.py”, line 1718, in init
fileobj = bltn_open(name, self._mode)
PermissionError: [Errno 13] Permission denied: ‘/data/mounts/unraid/Websites_2025-02-24_13.22_30786823.tar’

I have checked and the folder is not created. I have created it manually and it’s still not mounted.

Does anyone know why selecting a (CIFS) share works and (CIFS) backup doesn’t? I’m at a loss here.