You can find out how many and which positions are free in a cabinet by using the report function.
- Give the report a suitable name, e.g. Empty locations for Device X
- Create a report with data source Stock Locations Data
- Set the Report Type to Table
In the report Field settings, drag and drop Device ID, Location, and Has items assigned to the columns box.
Under the tab Filters set the Has items assigned to Exclude
Test run the report to see the result. You should see a list of all locations without items assigned to them.