To search for attachments in Gmail, the search parameter is has:attachment – this will bring up all emails with an attachment. If however you wish to find attachments over a certain size – to clean up your email – you can do this using size:.

So, to search for large attachments you could use the search size:10M – this will show all emails with attachments larger than 10MB

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Combine this search with the older_than parameter to find mail older than a certain period. For example older_than:2y will find mail more than 2 years old; older_than:30d finds mail over 30 days old.

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There are also some 3rd party products in the Google Apps Marketplace that will help you find large attachments, such as Free Space from Backupify and Find Big Mail.

If you still use Outlook take a look at this tip on how to find large attachments in Outlook.

Let us know what you think of this tip in the comments below.