Can I have a private folder but share only with staff

For now, only verified manufacturers have this option
Check this thread for sharing via Trimble connect:

This way, all members have access to the same models locally.

Note that the TC now has two ways of importing another file (=component!)
The old is turned into ‘visual reference’ which was and is intended to import a ‘project specific file’ such as the landscape or main building and the nee option to import as (regular) component.