So some rocks are radioactive because they have radioisotopes in their nuclei. Also they may have radon gas trapped in their crystals if they are igneous rock. They could also be radioactive due to the fact that the atom of the rock is unstable.
Connecting USB Devices Manually. Choose VM > Removable Devices to connect specific USB devices to your virtual machine. You can connect up to two USB devices at a time. If the physical USB devices are connected to the host computer through a hub, the virtual machine sees only the USB devices, not the hub.
Product Description. Turn any IDE or SATA drive into a convenient external drive! Simply connect one IDE/ATAPI or SATA-based mass storage device through a USB port to easily transfer files from a computer or laptop, backup files or store large file archives on an external hard drive. The USB 2.0 interface enables easy installation with its plug-and-play design.