make sure to empty the Trash folder to permanently delete these emails and reclaim storage space. Similar to Gmail, your Google Photos storage also contributes to your overall Google Drive storage ...
If the Google Drive desktop client is not running already, use the search box to run it. After that, click on its system tray icon, then click on the three vertical dots or settings icon ...
Google provides 15GB of storage per account across its services — Drive, Photos ... Deleted emails are moved to the Trash folder, where they remain for 30 days before being permanently removed.