How to attach files from Google Drive, Dropbox ?
I’m wondering the same. it is advertised as a feature of v8 but I can’t seem to figure out how to use it.
First of all you need to make your Google Drive to be like local folder. I make this with free program RaiDrive - https://www.raidrive.com/
After this when you may attach selecting files from Google Drive.
I hope this explanation has helped you.