#Run LiveUSB test in Virtual Box
First open diskmgmt.msc and note disk number for corresponding USB drive then run CMD as admin
TestUSB folder must exist! (Create it first with VBox, but don't create disk file!)
where PhysicalDrive1 = USB# in diskmgmt.msc
Then Run VBOX as admin, and point TestUSB to the newly created TestLiveUSB.vmdk
In this example Disk1 was D:, which I try to use for removable media, so I can re-use this VirtualBox but if you insert a new USB and it becomes E: this will not work, or need to be re-applied with new disk#
I reccomend having VBox always start as Admin, because if you try to run this Vbox as non-admin it will have to be reapplied.
.CMD to create TestLiveUSBVMDK inside folder TestUSB attached to Disk1 (D:):