I have loaded Leopard on to my G4 and all is functioning well - and I am using the Time Machine facility too. However, I have tried to connect another hard drive as an additional backup to leave at my home base - and I cannot see it in the directory and therefore cannot use it. I had disconnected the first external hard drive first before I tried to connect the 2nd one. I have turned the computer on and off and still there is no recognition of this second external hard drive. I am connecting it to the USB port. I hope that someone can assist me with this - I cannot work it out! Thanks - in anticipation.