Excerpt: It worked at the beginning. But one hour after I installed the OS it started to freeze and could not read or write anything. Used WD its own disk tools to test the drive (SMART self-test), FAILED with message "too many bad sectors"... I don't know what to say... Several years ago I bought a WD 2.5 internal HDD and died within one year. Now the new one failed in just one hour... I would not buy any WD HDDs any more.