How can I fix a drive that's become 'read-only'?

Episode 957 (41:21)

Louis from Hollywood, CA

Leo advises making a copy of the data and then running the Mac Disc Utility to repair it. Drives can go into read only mode for a variety of reasons, but it can be repaired. If he wants to get a complete copy of the data off of it, then it's just easier at that point to format it (HFS+) and start over. It may also indicate a physical problem with the drive controller. Job one is to get that data off, though!