To find out what's taking up so much space on your Google Drive, go to Google's
Drive storage page.
Not exact matches
The
page «About Cloud
Drive Transition to Unlimited Plans» at https://www.amazon.com/gp/help/customer/display.html?nodeId=201731340 says, «Note: Kindle Personal Docs will no longer count against your Cloud
Drive storage limits.»
Heavy Google
Drive users should head to the settings
page (click the wrench icon at the top right) inside
Drive to enable offline
storage.
Google Apps Script allows you to create a file - uploading
page that will save the uploaded file directly to your Google
Drive storage.