A 64 GB 3.0 HP USB flash disk is a portable storage device with a capacity of 16 gigabytes. It utilizes USB 3.0 technology, which offers faster data transfer speeds compared to USB 2.0. The "HP" likely refers to the brand, possibly Hewlett-Packard, known for its computer hardware and accessories. This USB flash drive is suitable for storing and transferring files such as documents, photos, videos, and more between devices like computers, laptops, and even some smartphones with compatible ports.