Unassigned Devices - Managing Disk Drives and Remote Shares Outside of The Unraid Array
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
If you are seeing unexplained disk or remote share activity, it may be due to cache dirs caching all folders. For those of you using the Cache Dirs plugin, you need to specify folders to be included so UD mounted disks and shares do not get included automatically. This can also apply to pool disks. It's really the best practice to specify the included folders so you control what is actually being cached.