You can use something like Grand Perspective app to find whats taking up all the space. But for oddness like you mention, run a disk check to make sure it's ok

You can use something like Grand Perspective app to find whats taking up all the space. But for oddness like you mention, run a disk check to make sure it's ok. Failing that do a NVRAM reset. https://www.macworld.com/article/224955/how-to-reset-a-macs-nvram-pram-and-smc.html https://www.macworld.com/article/224955/how-to-reset-a-macs-...