This product is either discontinued or we cannot get that from suppliers.
External Hard Drive WDBBGB0040HBK-AESN, External, 4 TB, USB 3.0 (USB 2.0), 256-bit, Included AC Adapter, Windows® 10, Windows 8.1, Windows 7; macOS High Sierra, Sierra or El Capitan.
The Western Digital WDBBGB0040HBK-AESN My Book drive is trusted desktop storage designed to complement your personal style with a massive amount of space to store your photos, videos, music and documents.