
If First Aid failed to resolve the issue, then your external drive should be damaged a lot, the last fix you can try is to reformat it.īut reformatting will erase all the data on this drive, so it's recommended to recover files from the external drive with a data recovery tool first, here we recommend iBoysoft Data Recovery - a professional external drive data recovery software, capable of recovering files from corrupted external hard drives, SSD, SD cards, and USB drives on Mac. When you see the error appearing on your Mac, using Disk Utility First Aid to repair it at once. It means that there may be some problems on the drive and you can't access photos, videos, documents, or other files on the external hard drive. The error usually occurs when you click the Mount option in Disk Utility.
