The document discusses different types of internal and external storage devices. For internal devices, it describes hard disk drives (HDD), solid state drives (SSD), hybrid hard drives (HHD), and the connectors and controllers used. For external devices it mentions USB flash drives, CDs, DVDs, and Blu-ray discs. It also provides information on identifying storage capacity from the device sticker, operating system, or BIOS, and lists several common hard drive manufacturers.