Google Drive gives you a fair amount of flexibility when it comes to sharing and collaboration. You can be as specific as you want to be about what you share, with whom, and what level of access you want to give.
Since you can only sync one Google domain locally (true of every file sharing app), you have to share your other google accounts with your primary one.
This is very easy to do. In each of the other domains, create a folder at the root (My Drive) level, and put every other file and folder in three. Then share that one folder with your primary Google Drive account. This way, if for some reason you want to exclude something from being shared with your primary account, you can easily create another folder at the root level that isn’t shared.
Once you understand, and have Google Drive setup with the right sharing infrastructure, the rest is pretty straightforward. In the video we’ll demonstrate this, and look at your other options for sharing and collaboration in Google Drive.