I press F12 repeatedly to select boot device.
AHCI controller:
- Hard disk
Other boot devices:
- floppy
- CD
- LAN
- continue booting
I followed How to boot from a USB drive in VirtualBox? box and the commands of vbox users to add it. but is plop boot manager compulsory?
I have guest-additions and virtualbox-extension pack installed and even my san disk lists in the settings menu -> USB .