Hi Ian, Basically, with USB cables one end is flat, the other end is square. Usually, the flat end goes into to the sending device, such as the PC. The square end goes in to the device, such as a printer, digital camera, or in your case a BookCourier. However be warned, not all USB cables are alike, though it is usually at the square end, where the connection can be large or small. (The BC uses a small one.) As regards the "hub", what was is designed for? It sounds like you might have a USB Network hub, used to connect PCs together, as opposed to one which allows 1 USB port from a PC to supply 4 devices. George. ________________________________ From: access-uk@xxxxxxxxxxxxx [mailto:access-uk@xxxxxxxxxxxxx] On Behalf Of Ian Macrae Sent: 14 January 2005 14:31 To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] USB CONNECTORS Hi all, Can anyone explain to me the difference between the square shaped USB connectors and the ones which are thinner and more rectangular? Most of the ports on my PC here are the latter type, which is fine because things like my Book Courier and Sarah's Palmtop plug up via the rectangular type. But I have a 4-way hub which only seems to accept the fatter square ones. However, I don't have any pieces of kit which rely on these. Does this mean the hub is of no use? Cheers now. Ian This Message has been scanned for viruses by McAfee Groupshield.