Unassigned Devices Plugin
Unassigned Devices (UD) includes a lot of functionality and has become a bit complex. Please read the first and second post. You will find answers to most of your questions.
Note: You will need to install the Unassigned Devices Plus (UD+) plugin to enable HFS+ and APFS (Apple file formats) and exFAT (flash larger than 64MB) disk mounting, and to enable 'Destructive Mode' for formatting of some UD supported disk formats.
UD and
The latest version of UD maps the remote shares to /mnt/remotes/. You are encouraged to change your Docker Container and VM mappings to the new mount point.
If you can't do that, go the UD settings and set 'Legacy Mount Point Compatibility?' to 'Yes'. Then unmount and re-mount the remote shares. There will be symlinks created at /mnt/disks/ to the remote shares mounted at /mnt/remotes/. You won't have to change any Docker Container or VM mappings.