WD 4TB Elements Disco rigido esterno portatile, USB 3.0 - WDBU6Y0040BBK-WESN
Capacity: 4TB. Corresponding OS: Windows 10, 8.1, 8 if (when used with Mac OS X is re-format needs of the drive) equipped with a USB A port Mac, there can be used to format this product. Power: USB bus power.