Your primary drive is used by Time Machine to keep local backups while the remote disk may or may not be available. That said, this is using too much space for that.See the pic.
I've never used this drive for my Time Machine so why so much taken on backups?
Can I delete them and if so how and where??
Like wizardofoz85 mentioned, just turn Time Machine off then back on and that space will zero out.OK, so where do I locate these files so I can delete them??