How To Delete Gmail Older Than X-number of Years

Recently I had the opportunity to help a friend that was approaching the space-limit for his Gmail account. He needed a quick way to delete all email older than three years old. Google has made this really easy. In the search bar, type older_than:3y

And this will display all email older than that date. You can simply check the [_] all box, and the link to select all conversations that match this and trash them.

This might take a few minutes if you have a LOT of mail that needs to be filtered through. But be patient and let it finish.

Then go to your Trash label, and check the [_] all box, and the link to select all conversations that match this and [Delete Forever] them.


UPDATE (20190513): You can also search based on file size, so for example "older_than:7y size:10m" would search Gmail for all emails that are older_than 7 years, and larger than 10MB.