As much you love connect apps into your drive to help you , some apps need to be disconnect because you either you connect them to test them , and wasn’t one for you , or you are no any more using them and your list is crowded .

So, here the steps of how to get disconnect those apps to connect or reconnect them when do you need.

Step 1: Go to Setting wheel icon >> Settings  as shown in below animation
Step 2: will pop up Setting Box window as below 
Step 3 : Select Manage Apps from side menu 
Step 4: A list of app will show up , beside the App you would like to disconnect their is a little Gray button written over option Click over it and Select Disconnect from Drive 
and here you go ,  your app is disconnected from your drive.