You can check your Gmail storage by scrolling to the bottom of your Gmail inbox to see a quick summary, or by visiting the dedicated storage page at
drive.google.com/drive/quota for a full breakdown of your usage across Gmail, Google Drive, and Google Photos. To see details in the Gmail app, tap your profile picture in the top-right corner, then navigate to "Manage your Google Account" and look for the storage section.
On a computer
Go to Gmail.com and log in.
Scroll to the bottom of your inbox. You will see a summary of your storage usage (e.g., "X GB of Y GB used").
For a detailed view, go to drive.google.com/drive/quota or click the "Launch" or "Manage storage" button next to the summary. This page shows a breakdown of how much space Gmail, Drive, and Photos are using and offers options to clean up your account.