So much for Google's promise of never needing to manage email storage again. 🙄 That was legitimately a selling point of Gmail back in the day, because we all used to spend so much time deleting email and their storage limit was HUGE in comparison to the storage limit of Hotmail or Yahoo! in 2004. I'll grant them that it took 19 years to get to this point, which is great, but my storage hit the limit today and I wasn't able to receive new messages so I've been downloading, saving in my own offline storage, and deleting emails all morning. Down to 90% storage used. 😕

Enter this into your gmail search box to find large messages, adjusting size and dates as makes sense for your situation:
larger:5m after:2004/9/5 before:2023/9/6