I have a small Denon home system with radio and CD player. This replaces an old Denon system which also had a USB connector. With the old system I could put music onto a flash-drive and play it through the system. The new system does not have a USB port, but it does have Bluetooth. Is there any form of device I can buy which I can plug the flash-drive into and it will provide a Bluetooth connection? I appreciate that I could use a pad, but that seems to be rather an expensive solution!