Virtualbox - "no USB devices available" error

I can’t attach any external drive to my virtual machine (I have three connected, two HDDs and a thumbdrive), none are detected in the machine settings:

Following advice on, I ran the command sudo usermod -aG vboxusers $USER to no effect.

Is it mandatory to install Extension Pack and Guest Additions for the machine?

A post was merged into an existing topic: How to install VirtualBox Guest Additions on Fedora?