So, you are the new happy owner of Google Apps Unlimited, and can store tons of files in your Google Drive. Then you have several computers you want to sync between. To make this easy, let's say you have 2 computers, where both have 2x1 TB disk. But you do different stuff on the different computers, and you want to make the most of your Google Drive, so you still have the files if you computer(s) crashing. So how do you do this?
Well, your first problem is that Google Drive reside on only one disk, usually under c:\Users\<username>\Google Drive. How do you make use of your brand new shiny 1TB disk which you have mounted on D:, and use the space on C: as well?
The answer to this is first to sort your stuff by different directories. So let's say you have some videos you've made. What you do is to make a directory D:\Videos. There you put all your shiny videos. You can even use up all your 1 TB space for those videos. Then you start up a command prompt as administrator [win-X Command Prompt (Admin)], and you type:
mklink /D "C:\Users\<youruser>\Google Drive\Videos" "D:\Videos"
And voila, you have a symlink in your google drive to the D:\Videos, which is now available as Google Drive\Videos. Give it a minute before you see Google Drive start to sync it.
But you don't want to have the videos on your other computer? Easy, just turn off the directory in your Google Drive->Preferences->Sync options.