To begin, SSD stands for Solid State Drive. Like a memory stick, there are no moving parts to an SSD. Rather, information is stored in microchips. Conversely, a hard disk drive uses a mechanical arm with a read/write head to move around and read information from the right location on a storage platter. An SSD does functionally everything a hard drive does, but data is instead stored on interconnected flash memory chips that retain the data even when there's no power present. These flash memory chips are of a different type than is used in USB thumb drives, and are typically faster and more reliable. SSDs are consequently more expensive than USB thumb drives of the same capacities. Like thumb drives, though, they're often much smaller than HDDs and therefore offer manufacturers more flexibility in designing a PC. While they can take the place of traditional 2.5-inch or 3.5-inch hard drive bays, they can also be installed in a PCIe expansion slot or even be mounted directly on the motherboard, a configuration that's now common in high-end laptops and all-in-ones.

Roku is a media streaming service which allows you to view content such as Netflix, YouTube, Amazon on Demand and others.

No, a hdmi cable is not included.

Yes, it is compatible.