How attach from Google Drive, Dropbox?

v.8.0.2951 PRO
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 -
After this when you may attach selecting files from Google Drive.
I hope this explanation has helped you.