Before buying, you can check your current usage at google.com . This page lists your files by size, allowing you to delete large, unnecessary items to free up space. How to buy more Google storage | Web
In the Google Drive app, tap (three lines) > Settings > Upgrade Storage . In the Google One app, tap Upgrade at the bottom. how to buy google drive storage
Navigate to and sign in to your Google Account. On the left-hand menu, click Storage . Select Get more storage or Upgrade . Before buying, you can check your current usage at google