The fastest way to clear space in Gmail is by deleting large emails. Although cloud storage services make it incredibly easy to upload and share files, many people (or companies) send large email attachments. Over time, you’ll be wondering where the 15GB of storage went and why you’re being prompted to buy more space.
If you’re in this position, a targeted strike at large attachments is the fastest way to free up space. We can use the size parameter to do that. In the search bar in Gmail, type: size:5m. This will reveal all emails taking up 5MB or more space in Gmail, which you can review to see how much you need them, select the ones you don’t, and delete them.
Similarly, you can try different terms such as size:1m for emails larger than 1MB or size:20m for emails larger than 20MB. The number before m signifies the number of megabytes you want to filter by, so you can change it according to your needs.