How to recover data from external hard drive on Mac
Read this article if you are unable to recover lost data from your external hard drive or your Mac laptop is not reading your external hard drive. Know how you can use some Mac-native as well as free tools to help your recover data from external hard drive on Mac.
Mac's that come with SSDs have limited storage. For instance, my MacBook Air has only 256GB of hard drive space. As a result, I keep most of my files on external hard drives and USB pen drives. However, it is not uncommon when Mac's don't read these external disks or the drives become unmountable or corrupted. Let's see how you can recover data from external drives even when your Mac is unable to read the drive.
Basic cable and hub check
It is possible that everything is fine with your external disk and the problem might be due to damage in the connecting cable or port C to USB connector hub you are using. Try to rule these issues out by using another cable or a hub. It can even be an issue with the port you are using on your Mac. Try to rule this out by using the other port or using a different Mac altogether.
Repair Disk with Disk Utility - First Aid
If your Mac is able to mount your external disk but is unable to read it, you can try repairing the corrupted disk by using the First Aid utility present in the Disk Utility of your Mac.
Use a tool to recover files from a corrupted, unmountable or formatted external disk
For this to work, your Mac laptop needs to be able to detect an external hard drive connection. If that itself is not working, try this detailed guide from iBoysoft.com to troubleshoot External Hard Drive not showing on your Mac laptop.
Assuming that your Mac is detecting the drive even if it shows that it can't read it, you can follow the following steps to recover files from the attached external hard drive.
Repair external hard drive using FSCK
FSCK stands for "File System Consistency Check". This tool scans your hard drive, reviews its structure and attempts to repair it if any damage is found. This tool on Mac is similar to the one that is found on Linux operating systems. Let's see how you can use it on Mac.
followed by the enter button.
and is usually present on the leftmost side of the command result.
when the part "/dev/disk3" needs to be replaced by the disk identifier you have noted down before.
/sbin/fsck_hfs -fy /dev/disk3
In case none of the above methods work, it is possible that there is physical damage to your hard drive. It is best to take such a hard drive to companies specializing in recovering data from physically damaged drives. Let us know through the comments section if we have been able to help you recover your data from your external hard drive.