Unable to delete massive "Other" under Manage Storage

I am running BigSur 11.4 and noticed I have a huge amount (160GB) of "Other" under manage Storage.
As it is greyed out I am unable to identify what this would entail and all guides that I found on internet did not not help.

If I search by file size there is nothing that stands out which could explain the many GB's in the other category.

Does anyone have any experience with this?

Thanks

Snapshots and protected files created by the OS. You can't delete them!