How to fix the corrupted external hard drive on Mac In the next section, you will learn what to do if the First Aid repairing process has failed on external hard drives. Most of the time, First Aid's failure on external hard drives is due to severe disk corruption which was brought about by improper ejection, physical damage, virus infection, or other reasons. It has the capability to detect and repair the damages to partition map, master directory block, device driver, and so on.īut why did Disk Utility's First Aid would fail on external hard drives? Read more > What does First Aid do in Disk Utility?įirst Aid in Apple's Disk Utility is a small utility designed to verify and fix minor problems of a drive, such as repairing the drive's data structures, fixing external hard drives not mounting on Mac, and external hard drives not readable on Mac and so on. Recover Files Disappeared from External Hard Drive on MacĤ methods to recover disappeared/missing/deleted/lost files from USB external hard drives and SD memory cards on Mac computers with free Mac data recovery software.
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