Even with the second order of the same disk again no luck. If Windows XP (soon upgrade) is not recognized. Sometimes it does not give it, then again nicht.Auch the described procedure lt.Anleitung with formatting etc. is useless. The drive is working, but you do not know what. Scheduled backups are all flawed, well. With the usual test methods Crysttaldiscinfo among other things, the hard disk for defects, sector error is the main reason. A computer specialist do not continue except that must be defective disk. Other external media work on the same PC USB port easily. If the 2nd time. Unfortunately goes back. Have the hard disk also tried on my home PC, same result. Here hang off yet another 3 hard drives, a surprise for 3 years without any problems (Western Digital, Iomega). Monday merchandise or just bad luck?