I bought a Western Digital MyBook 1TB external hard drive a while ago and it was working fine with my Powerbook G4 running Tiger. But when I wanted to have it connected to my Intel Mac Mini running Leopard it always has a few problems. 1. It randomly disconnects and the message for external hd not ejected properly. 2. When I try to copy a large file to it like a 500MB file it goes so slow and when it looks like it will finish I get the error code -36 3. After all the problems 1 and 2 it won't eject and when I try to unmount it from disk utility it says it can not be unmounted. I have tried to reformat the drive for mac with the extended journaled and partitioning and erasing with boot disk procedures. Still nothing seems to work. I don't know if this matters but I bought it at a Walmart and it wasn't mac formatted. Would I have to specifically buy a mac formatted external hd in order for it to work in leopard? Or can I some how format this to work properly on my computer. I also have an Iomega 120GB drive that I bought a few years ago from apple.com and it works flawlessly on both my PB and MM. I just have a hard time believing that only certain hds will work for an intel mac running leopard. I thought all hds were the same and could be formatted to run on any system. If anyone could help me out I would greatly appreciate it.