Summary: Well, that's what "Bulk/OEM" means (Original Equipment, Manufacturer). It's usually the main item packed generically and w/o the accessories. It is assumed that if you buy an OEM product that you already know how to install/use it without the extras. These are good, solid drives, fast enough, and built to last longer than the run-of-the-mill stuff found in pre-built PCs.
Summary: I returned it because it was sold as new but when I tried to register it with Western Digital to validate the warranty they said it had no warranty. It was to old. I contacted the seller and arranged a full money back refund. I returned the item to the seller. When you sell items as new they should have a valid manufacture warranty and if they don't they shouldn't be able to sell them as new because they aren't. They might qualify for antique status but not new.
Summary: I've always used Western Digital and only once had a problem, that was quickly taken care of with the Warenty. This was an Exceptional buy because of the Price. Would highly recommend this to anyone not needing mass Storage!