I have a new JVC HM550. While it transfers movies and pics to a computer with no problems, it is also supposed to work directly with standalone external USB hard drives. However, my HM550 doesn't recognize the external hard drive (I tried several models, from a 2TB Cavalry to a 400GB hitachi) when connected per instructions. When connected, a special "USB" menu is supposed to be activated which allows file transfer between camera and hard drive, but nothing happens. The hard drives were already formatted and properly functional. JVC tech support hasn't replied to my email.
Thanks for any advice.