I have a slightly flaky old disk which was once used with Time Machine on an old Mac. Since Time Machine is no longer part of my workflow, I'd like to just access this disk like any other HDD. Currently, when I try to delete files I receive the message "The operation can’t be completed because backup items can’t be modified."
Edit: I tried using
tmutil associatedisk, but I don't see any old versions when I "Enter Time Machine".