How to recover files from an external hard drive on Mac?

Select the corrupted external hard drive to scan for lost data

When the Mac data recovery software is launched, all connected storage devices will be listed in the interface. You can see the name, file system, and space allocation of your hard drives and partitions. If you can find the corrupted external hard drive in the list, select it and then click Scan to search for data on this external hard drive.

Two scanning modes are allowed: Quick scan and Deep scan. Quick scan mode saves time for users and is applied when data is recently deleted. Deep scan mode finds more files at the cost of more time, and it's used when the file system is corrupted or the partition table is lost. Anyway, this software will automatically choose the most efficient way to scan files according to the disk condition.

Preview the searching results and recover the target ones

iBoysoft Data Recovery for Mac has a preview feature, with this feature, you can check whether your files on this disk are in a good condition or not. It saves a lot of time and money for you. The software will show if your file is corrupted so that you would not waste energy to recover it or pay for this data recovery product.

If you find the target data and it is in a good condition and can be recoverable, simply click Recover to get it back.   

Finally, after ensuring all files you need have been recovered successfully, you can use Disk Utility to format the external hard drive and make it work again.