The WD My Book Essential External Hard Drive is a desktop external HDD designed by Western Digital. This black hard drive is part of the My Book product line, known for its reliability and storage capacity. The model number WDBAAF0010HBK-00 indicates a specific variant within this line, offering ample space for storing large amounts of data and multimedia files. Perfect for use with computers, laptops, and other devices, this external hard drive provides a convenient and efficient storage solution for expanding the storage capabilities of your system. plugged in turns on ships from the USA.