How to sovle wd/seagate external hard drive not working on Mac?

Most of the time, when we connect a WD/Seagate external hard drive to our Mac's USB port, we soon see the WD/Seagate external hard drive appear on the desktop. However, sometimes, WD/Seagate external hard drive doesn't show up in Finder or on desktop. What should we do when a WD/Seagate external hard drive stopped working on Mac? There are several solutions to solve it:

Solution 1: Check USB connection, USB cable, USB port

If WD/Seagate external hard drive stopped working in Finder and disk utility, please check USB connection, USB cable, USB port and then try again.

Solution 2: Repair with disk utility

If WD/Seagate external hard drive stopped working, please select this WD/seagate external hard drive in disk utility and then click First Aid to repair it. Sometimes, the WD/Seagate external hard drive can be repaired. If the WD/Seagate external hard drive cannot be repaired, please go to solution 3 and recover lost data.

Solution 3: Try data recovery software

If WD/Seagate external hard drive is not mounting or unreadable in disk utility, we can try Mac data recovery software to recover lost data firstly and then reformat it.

M3 Mac Data Recovery is a professional Mac data recovery software which can recover deleted/lost files from emptied Mac trash, recover data from formatted drive, unreadable, unmountable, uninitialized drive in macOS High Sierra/Sierra/EI Capitan/10.9/10.8/10.7.

Tutorial to recover data from unmountable/unreadable wd/seagate external hard drive with M3 Data Recovery

Step 1: Download, install and then launch M3 Mac Data Recovery on your Mac computer.

Step 2: Select external hard drive

Free Mac data recovery software - M3 Mac Data Recovery

Step 3: M3 Mac Data Recovery is scanning lost data from unmountable/unreadable external hard drive

Scan lost data from unmountable/unreadable external hard drive

Step 4: Select the found files you expect to recover and then click Recover to recover lost data from unmountable/unreadable external hard drive.

Recover data from unmountable/unreadable external hard drive

After data recovery from unmounted/unreadable wd/seagate external hard drive is successfully done, please try to reformat it, it will be working again after format completes.

Solution 4: Seek help from a local data recovery professional

If wd/seagate external hard drive is not recognized by disk utility and any data recovery software, in this situation, generally speaking, wd/seagate external hard drive has hardware issue, please send unrecognized wd/seagate external hard drive to a local data recovery professional for help if we lost the important data.