Cant see file structure of zumo xt in BC

Hi Forum,

Newbie here.  Just bought a Zumo XT which seems good, but having a few issues when trying to use with Basecamp.

Although my Zumo XT seems to connect to BC OK, I cannot see any file structure for my device.  I read that on a Mac one needs an Android file transfer tool to access the internal storage files, etc.  Is that right?  Can anyone advise?

Thanks for any help.