The draw.io app for Google Drive lets you work more easily with diagram files stored in your Google Drive account.

1. Log into your Google account.
2. Go to the draw.io for Google Drive listing on the Google Workspace Marketplace and click Install.
   
3. Click Continue, then choose the account you want to install draw.io into, and sign in or click Continue, if prompted by Google.
   
4. Click Allow to give permission to the draw.io application to access your diagram files in your Google Drive account.
   
   Google will now install the draw.io for Drive app.
5. Click Done to close the installer.
   

You can now use draw.io from within your Google Drive account - click on the Google Apps grid in the top right, scroll to the bottom to where your marketplace apps are, and click on draw.io to go to the diagram editor.

Tip: draw.io apps for Google Workspace are also available for Google Docs and Google Slides.