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Could someone explain why does the user needs to be added to the virtual box, please/

How to add users to vboxusers to enable USB usage

The problem is described and solved in the above link.

Scilla
  • 103

1 Answers1

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When a USB storage device is connected, it is usually mounted in /mount/{username} with access permissions being granted to {username}. For example, when I plug a USB stick into my notebook, I can see this in the appropriate /media directory:

drwxr-x---+ 3 root  root  4096  3月  3 10:00  ./
drwxr-xr-x  3 root  root  4096  9月 23  2019  ../
dr-xr-xr-x  1 jason jason 2048  8月  1  2020 'Ubuntu 20.04.1 LTS amd64'/

VirtualBox VMs operate under the vboxuser group permissions. So, just like you cannot access or modify root-owned files without sudo, VirtualBox cannot access {username}-owned files without permission. By adding {username} to the vboxuser group, VirtualBox will have a degree of access to the USB-mounted storage locations.