OK, This is my situation. I have switched from the Windoze world to Mac and I have a Maxtor 250 gb hard drive that is NTFS formatted w/ lots of data so formating is not an option. I plugged the drive in my PowerMac that I just got and the drive mounts and I can browse through my files on it, but when I try to copy anything from it to my main HD I get the screen of "You need to reboot". I have hooked the drive up to the same cable as the main HD is on as a slave and I have also hooked it up as a slave and a master on the 2nd cable. I do have external firewire casing but I was hoping to keep the drive internal. I forgot to add that I do have a Maxtor 200 gb Plus 9 hard drive in the G4 as well and that one I can access and copy data from it too is NTFS formated. And yes I have made sure that I didn't have it as master when I had the other drive connected on its cable as master and the same when I did one as a slave. Any suggestions on whats going on? All help welcomed!