How many GBs should Mac OS use on MacBook Pro

My MacBook Pro using Mojave says my "System" is using 264 GB of storage.

System Data?

Please read See used and available storage space on your Mac - Apple Support. Pay particular attention to the description of System Data.

• What Apple used to label "Other" is now labeled "System Data".

You may find neuroanatomist's User Tip helpful: What is "Other" storage on a Mac, and how can I clean it out? - Apple Community.

BayRocket21 wrote:

My MacBook Pro using Mojave says my "System" is using 264 GB of storage. That seems high since much of what I read says it should use more like 40 GB. What am I missing?

You can see from the Terminal.app copy and paste:

diskutil list internal