Switching between different Google Drive accounts has never been easier with Shift.  Here is how:

To switch between Google Drive accounts:

Mac 

1. Select the Google Drive Account you wish to view in the left-hand taskbar

Keyboard shortcut: Alt + Cmd + Down/Up Arrow

2. Click on the Drive tab on the top right corner of the screen

Keyboard shortcut: Cmd + 3

3. Arrive at the Google Drive of your desired Account

Windows & Linux  

1. Select the Google Drive Account you wish to view in the left-hand taskbar

Keyboard shortcut: Ctrl + Shift + Up/Down Arrow

2. Click on the Drive tab on the top right corner of the screen

Keyboard shortcut: ​​Ctrl + 3

3. Arrive at the Google Drive of your desired Account