The Toshiba external hard drive is not showing in Disk Management or in This PC.The hard drive is detected but not showing any files.The Toshiba disk is showing up in both Disk Management and This PC but is inaccessible.Then you will see yourself in one of the following cases: Go to 'This PC' > 'Manage' > 'Disk Management'. Connect your Toshiba hard disk to your computer using the Toshiba cable. To help you fix your problematic device quickly, you should specify your situation according to the steps below before applying the fixes for 'Toshiba external hard drive not working'. What's going on with my drive? Do know you how to fix this issue?'Įxternal hard drive not showing up or detected is just one of the many situations that indicate your Toshiba hard drive is not working. It suddenly disappeared from my PC but the light of the drive is still on. 'Hi there, do you know how to make external hard drive show up in PC when it failed to be detected? I have 1TB Toshiba external hard drive with almost 500GB data saved on it. 1TB Toshiba External Hard Drive Is Not Working and Undetectable, Help!