Data Storage 3,5" USB-C connector, interface USB 3.2 Gen 2 (USB 3.1), for 2 piece(s) discs Do you want to optimize the way you store information on your computer? If so, you should consider this WD My Book Duo 24TB data storage. The heart of the storage is an HDD with a format of 3,5". The big advantage of an HDD is that it has a better ratio of cost to capacity. However, the customer must remember that this type of disc is prone to damage from vibration and impact. It's ideal for home or office use, where one doesn't need move it around. The 3.5" format is designed for those who require more storage, without needing to travel with it. They are best for offices and studies. It'll need external power to run. The WD My Book Duo 24TB uses USB 3,2 Gen 2 (USB 3,1) for the transferring of data. WD My Book Duo 24TB Data Storage Key Features Western Digital data storage type is HDD Needs external power Connects with USB 3.2 Gen 2 (USB 3.1)