Several times, it happens that errors occur on the system because of the poor connection between the hard drive and PC. Fix #1: Check The Connection Of Your Hard Drive Therefore, let’s see which method will work for you. Here I’ve listed the best possible solutions to repair Toshiba external hard drive not showing up on pc with ease. So, please read this article till the end to know how to access the Toshiba hard drive without any data loss… How to Fix Toshiba External Hard Drive Not Showing Up? But, you need not worry, here in this post, you are going to learn some useful methods to fix Toshiba external hard drive not showing up issue. This issue occurs usually in the Mac/Windows 10 and can lead to data loss. Sometimes, it may happen when we try to connect our Toshiba external hard drive to the PC, it may not show up or undetected.