On my MacPro Postbox has created a folder at HD > Users > me > Application Support > Postbox which contains 13GB, presumably my full GMail database.
My start up drive is a small SSD, so I want to move this folder to another drive in the computer. I copied the folders and thought I linked to the new location but when I remove the original Postbox folder and relaunch, Postbox demands a new installation and remakes the folder.
How do I move the Posbox folder to another driver?
(Why do I even need this back up of all emails from GMail?)