Samsung M3 External Hard Drive Not Recognized on Mac, How to Fix

I'm using a Samsung M3 external hard drive. I've used it with my MacBook Air for 3 years now. This is the first time I've tried to use it after updating to Sierra, and my MacBook Air isn't recognising it! Can I recover data from it?

Don't worry if your Samsung M3 external hard drive is not recognized on Mac, and it's possible to recover files from an external hard drive not detected on Mac.

The most effective way is to use the professional external hard drive recovery tool EaseUS Data Recovery Wizard for Mac Pro.

The EaseUS Mac hard drive recovery software can recover data from your unrecognizing Samsung M3 external hard drive with only 3 steps. Take a look:

After recovering the Samsung M3 external hard drive, you can open Disk Utility to mount the unrecognized hard drive. If it is still unrecognized after mounting, the possible reason is the file system of the external hard drive is not compatible with macOS; in this case, consider formatting the external hard drive to make it workable.

Check out the following steps to format an external hard drive on Mac using Disk Utility:

Step 1. Open Disk Utility from the 'Applications > Utilities' folder.

Step 2. Select the Samsung M3 external hard drive in the left list, and click 'Mount' in the top menu to check if your Mac recognizes it.

Step 3. If not, Click on the 'Erase' option to format your external hard drive and set the new format that is compatible with macOS.

Note: Formatting the external hard drive will erase all data on it, so you should back up it first or recover data from the external hard drive using EaseUS Data Recovery Wizard for Mac Pro.