External storage devices are designed to create easily expandable extra capacity for laptops and desktop PCs. They can feature single or multiple drives, and are usually connected by USB, USB-C or Thunderbolt interfaces. Portable USB based external drives are host powered so no additional power supply will be need, however larger desktop format drives will come with a dedicated power supply.
These external USB drives use mobile 2.5in HDDs, in a compact portable host powered format, however for additional security they feature tamper-proof designs and AES encryption to secure your data, plus a keypad to enter a PIN to gain access.