However, it does not show files outside the Finder ... In the same way, you can use the Terminal command to view all hidden files in the external drive directory. You can also use third-party ...

Thankfully, there are a few workaround to enable the display of your hidden ... folder you're viewing. The hidden files and folders will be grayed out. Hit Command + Shift ...

This keyboard shortcut will also unhide hidden files and folders in other directories. So, remember to press Command + Shift ...