I have looked on Virtual box forums for the answer. I have a new Dell laptop with W10 64 bit. I followed the instructions for making a bootable usb with Kali Linux installed. I used Windows 32 disk manager to make the usb bootable. After the operation was completed a message box popped up to say that the usb was verified. I am trying to install Kali Linux on Virtual Box. When I plug in the usb there is a message pops up stating the disk needs formatted. Did the usb not get made properly