Can't add external storage, always getting the red exclamation mark!

Can’t for the love of me add my external SSD as external storage in Nextcloud!

Nextcloud is running inside OMV through portainer. I have read and watched countless of Youtube videos on how to add external storage in nextcloud but the red exclamation mark always shows up.

It has been weeks of trying. Please help me troubleshoot!

OK I think I solved it for now. For anyone who has the same problem, check the container settings. I went to portainer as nextcloud is a container inside OMV, and created a new mount for the external disk.