Summary: Drive arrived with errors. Returned and ordered a Seagate drive from Newegg. My laptop had a HGST(Hitachi) drive from the factory, but was failing. I thought I'd replace it with the identical drive, but that was a mistake because Western Digital bought Hitachi and I've NEVER had a Western Digital drive that worked......NEVER EVER. I've always had great luck with Seagate and have NEVER had a bad drive out of the box from them.