The Raspberry Pi is a tiny, low-power, low-cost computer. But in order to keep the price of the $35 computer low, the developers have left out some key features… like built-in storage. Users need to install an SD card for the operating system and a USB drive if you want additional storage space.
Want a simple way to add a lot of storage? The Western Digital PiDrive is a 1 terabyte hard drive designed specifically for Raspberry Pi computers.
So what makes this kit different from any other hard drive? First, it comes with a 4GB microSD card which you can use for operating system files. Second, it comes with a special USB 3.0 cable that’s designed to connect to the USB port of the Raspberry Pi and the power port of a Raspberry Pi and a power adapter.
This lets you use a single cable to connect the hard drive to the computer and to power both devices.
Western Digital says the drive is compatible with the Raspberry Pi Model B+ and the Raspberry Pi 2 Model B.