This continues to happen to my Macbook. I spent three hours on the phone in order to solve this issue the last time after repeatedly explaining that issue was not in how much stuff I have on my laptop, but an error with "system."
MacBook Air 13″, macOS 10.14
Hello aubrie112,
Thank you for using Apple Support Communities!
We understand from your post that System storage is taking up the majority of your storage space on your Mac. While you have spoken to phone support in regards to this issue, it has not been resolved. If you have not already, backing up your Mac and reinstalling macOS may help. This article has information on how to use Time Machine to back up your Mac:
Back up and restore your Mac - Apple Support
Once your Mac is backed up, then use the steps from this article to reinstall macOS:
How to reinstall macOS - Apple Support
Regards.
Macbook storage consumed by system
