I bought a 160Gb last week.I formatted it as ntfs on my work pc. Took it home and it wont read on any of my pcs. Also hearing a faint clicking sound. Thinking the drive is dead, I brought ti with me to office to return at the store on my way home. Out of curiosity I connected it to my work pc and it works fine. I took it to my coworker's pc and it wont recognize. Tried on 2 other PCs, same result. it doesnt shwo up as a device. It only works on my work pc which is a dell sc430 server. Should I return it or is there somew way to get it running.