Before you start any process of deleting stuff from your Google account, you must check the Google storage used to see what the main problem is. Google is very generous; 15GB of your storage can be used on your Gmail, Google Drive, and Google Photos for free. If your storage limit is going down very fast, you probably need to look into how the storage is spread over all the services. There, one can learn about which items, like large files, attachment emails, or photos, are eating up the most storage. With the help of seeing what part of your storage is used, you can target your clean up efforts at those aspects that are most consuming storage space instead of mindlessly deleting stuff.
