The WD My Cloud EX4 4-Bay Network Attached Storage device by Western Digital is a versatile storage solution for various devices such as laptops, PCs, iOS, Mac, and Android. With its USB 3.0 specification and black color, this network attached storage offers high-speed data transfer. The 4 bays accommodate HDD drive types, providing ample storage space for your files. This model from the My Cloud product line also features cloud storage capabilities and an Ethernet interface for convenient access to your data. Perfect for expanding storage capacity and accessing your files from multiple devices.