So I was looking at my hard drive and comparing a part of it to an rfid sensor which can basically store data with no battery and get collected through the air.(basically an sd card that you can read through the air with no battery) and the part on the hard drive looks exactly like the rfid sensor and has the same amount of pins so I think these drives can get raided through the air so what I would do is check your drives and add a piece of tape over the connectors and than wrap your drive in aluminum foil or something. The hard drive is from western digital and its called scorpio