Toshiba External Hard Drive Not Showing Up in Both Disk Management and This PC Here's a quick table overview of the most well-known issues of 'Toshiba Hard Drive Not Working' and their corresponding fixes. Toshiba Hard Drive Not Working - Common Issues and Appropriate Fixes

However, if your PC still can't recognize or detect your Toshiba hard drive, tap into the fixes listed below to resolve the problem. You can solve most of these issues by simply updating your OS and system drivers or by reconnecting your Toshiba external hard drive. Your computer is missing the assigned drive letter.There are many reasons why your Toshiba external hard drive isn't showing up, working, or recognized by your Windows/Mac device. Reasons Why Toshiba External Hard Drive Isn't Working or Recognized