Had stopped at 57% of the first backup, immediate response of the seller and WD and everything is OK! The problem is known on the forums. We must treat the first installation, see the same again if necessary, and it's good! Excellent product, comes with its simple and effective software, which is not required to use. A utility software used to diagnose the hard disk (fast or depth. Error messages can be generated, WD gives you meaning. If necessary, the exchange is proposed without discussion (by seller + WD). 5/5 richly deserved!
