GoogleDrive

Refresh Folder

You can refresh a google drive folder by typing control right click on the folder in Finder. This will give an option to Refresh folder in the menu that is not there in the normal menu.

Clear Cache

In order to clear the Google DriveFS cache, you close Google Drive and kill any Drive Helper processes (ps axww|grep -i google.*drive). Then rename ~/Library/Application Support/Google/DriveFS to something else e.g.

cd '~/Library/Application Support/Google' 
mv DriveFS DriveFS-$(date +%Y%m%d)

Start Drive and login. This will take a bit of time to sync.