Data Storage 3,5" USB-C connector, interface USB 3.2 Gen 1 (USB 3.0), capacity 28000GB, for 2 piece(s) discs Do you want to optimize the way you store data on your computer? If so, you ought to consider the WD My Book Duo 28TB data storage. The heart of the storage is an HDD with a format of 3,5". One big advantage of a classic 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 is perfect for use at home or at the office, where one won't need to move it around. The 3.5" format is primarily designed for those who need more storage, but don't plan on travelling with it. They are perfect for the study or the office. It'll need an external power source. The WD My Book Duo 28TB uses USB 3,2 Gen 1 (USB 3,0) for the transfer of files and data. WD My Book Duo 28TB Data Storage Key Features Western Digital data storage type is HDD Requires external power supply