How do I delete the "other" space that is being used. My MacBook is using 77GB in other and I can not remove it?

Hi kryptonite9267B,

"Other" mainly refers to internal files and saved data used by third-party apps. To reduce the amount of space taken by Other, please see this user tip: What is “Other” storage on a Mac, and how… - Apple Community

That Other category is managed by the operating system and not you. Apple has an article, See used and available storage space on your Mac, and an excerpt about Other is below: