

If Disk Utility cannot repair your disk which is unmountable, the last solution is to reformat the unmountable external hard drive, but in order to avoid data loss, you have to recover lost data from the unmountable external hard drive as soon as possible. Fix 2: Perform data recovery before reformatting Step 3: Select First Aid in the top center and click Run. Step 2: Choose the grayed-out Toshiba external hard drive. No matter what problems you are meeting on a disk, First Aid is your first choice to repair it. Fix 1: Repair unmountable Toshiba external hard drive with Disk Utilityįortunately, Mac has a built-in repair tool to check and verify minor errors on disks called First Aid.

Toshiba external hard drive won't mount in Disk Utility? Can't stand the loss of important files? There are two effective solutions to Toshiba's external hard drive not mounting on Mac. How to fix Toshiba's external hard drive not mounting on Mac? In this post, you will get solutions to Toshiba external hard drive not mounting on Mac without data loss. What causes Toshiba external hard drive not mounting issue? There are various reasons, such as virus attack, power failure, damaged volume header, file directory corruption, etc. The most common one is Toshiba external hard drive not mounting on Mac. However, it also brings you many troubles. Toshiba's external hard drive is so famous that numerous people are using it. Any suggestion to fix Toshiba external hard drive not mounting on Mac? In Disk Utility, it was not mounted and I cannot do anything but format it which I don't want to do. Yesterday, I plugged the drive into the USB slot to find it no longer appeared on the desktop. I have a Toshiba 2TB External drive which I have used for the past 5 or 6 months to keep copies of my iPhoto Library and my Time Machine backups on.
