Hdd extern wd, my book, 28tb, 3.5", usb 3.0 capacity 28 tb interface usb 3.0 gigabit ethernet compatibility system requirements • windows® 10, windows 8, windows 7 or windows vista® operating systems • macos mojave, high sierra, sierra, el capitan, yosemite, mavericks or mountain lion operating systems • dlna®/upnp® devices for streaming • router for internet connection supported browsers • internet explorer® 10 or higher • safari® 6 or higher • firefox® 30 or higher • google chrome™ 31 or higher on supported windows and mac os platforms note: compatibility may vary depending on user’s hardware configuration and operating system. dimensions (l x w x h) 154.94mm x 99.06mm x 171.45mm in the box my cloud ex2 ultra device ethernet cable power supply quick install guide https://shop.westerndigital.com/en-ie/products/network-attached- storage/wd-my-cloud-expert-series-ex2-ultra#wdbvbz0280jch-eesn olishop.roa