flash drivesĮxternal hard drives are basically hard drives (HDD) or solid state drives (SSD) that are wrapped in their own protective casing and connect to your computer from the outside as opposed to the inside. There are hard drives that may hold volumes like 3TB, 6TB, and 10TB, but they are much less common than the standard hard drives that hold: 1TB, 2TB, 4TB, 8TB, and 18TB.
