Do you work from a normal user account rather than an admin one? This should let you check Time Machine using the T2M2 app.
Used since Roman times, it was common in the dress of saints. Highly toxic, it was progressively replaced by cadmium red in the late 19th century.
Summary of the hidden folders and files you’re most likely to encounter at the top level of a volume, and at the top level of your Home folder.