Final answer:
External hard drives are portable storage devices that connect to a computer through a port and function similarly to internal hard drives. They typically have a larger capacity and can store up to 8 TBs or more of data.
Step-by-step explanation:
External hard drives are portable storage devices that are connected to a computer through a port. They function similarly to internal hard drives by allowing users to store and retrieve data. However, external hard drives typically have a larger capacity than internal drives and can have up to 8 TBs or more of storage space.