www.virtualbox.org/manual/ch09.html

just search for 9.9. Advanced storage configuration and it will give you information on how to attach a RAW disk image.

www.howtogeek.com/124622/how-to-enlarge-a-virtual-machines-d...

When you create a virtual hard disk in VirtualBox or VMware, you specify a maximum disk size. If you want more space on your virtual machine’s hard disk later, you’ll have to enlarge the virtual hard disk and partition.

derekmolloy.ie/resize-a-virtualbox-disk/

My Linux VirtualBox guest OS often runs out of space – I never learn that to build anything in Linux, you need about 10 times the amount of space that you think you need. Also, VirtualBox recommends very small default ...