Toshiba Hard Drive Detected, But No Visible Files Recover files using data recovery software Viruses, file system errors, corrupted data, or access permission issues. Toshiba External Hard Drive Detectable, But Inaccessible (Can't Access Files in the drive) Assign a drive letter to the Toshiba drive Viruses, file system errors, or improper drive usage. Toshiba Hard Drive Showing Up in Disk Management, But Not in This PC Turn on USB Hub and Show All Hidden Devices Update Toshiba external hard drive driver Loose connection, faulty USB port or cable, outdated USB drivers, or unassigned drive letter. 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