Unfortunately, just four weeks as an additional hard drive as a backup this external Fetsplatte - survived solution to my Apple Airport Station. Now she is no longer detected neither at the Airport station yet on Macs and PCs as a hard disk. Too bad. Supplement 03.04.2015 Of a rating increased to three. Amazon has replaced without flinching the defective disk. The new backup solution now purrs already more than a month. If the new disk last longer than two years, I will correct the rating upwards again.