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How to get more space in your Google storage
Get rid of all your unwanted Google email, attachments, and photos to save storage space.
You can check your current storage status by visiting this page, and if push comes to shove, you can purchase more space there, too, for as little as$2 a month for an extra 100GB. Google Drive is a common place for space-sucking files to build up and wear down your quota, but tidying things up doesn’t take long. If you’ve been saving photos at their original sizes, you can free up tons of space by converting them to Google’s “Storage saver” option (which used to be called “High quality”).
Or read this on The Verge