Disk says full. too much memory is being used by system 40GB

I'm trying to update to the new operating system but i get a warning that says I don't have enough disk space. I've emptied trash, etc., but it looks like the majority of storage is taken up in mail. how do open up more storage?

Hi JGBIGPAPA,

I see that your hard drive is full, here is some recommendations, Before you read the recommendations, how much space do you have left on your hard drive?

-Delete useless applications, and documents.

-Turn on auto empty trash.

-Optimize storage.

-Reduce Clutter

How much free space is on the Hard Drive?

Have you emptied the Trash recently?

You need to create your own discussion. See:

https://discussions.apple.com/docs/DOC-11261

Any luck yet?