Final answer:
The mass storage device widely used for home and small business storage is an external hard drive.
Step-by-step explanation:
The mass storage device widely used for home and small business storage is C) External Hard Drive.
External hard drives are portable devices that connect to a computer and provide a large amount of storage space, typically measured in terabytes. They use magnetic encoding to store and retrieve information quickly.
Unlike solid-state drives (SSD) and USB flash drives, external hard drives offer higher storage capacities at a more affordable price, making them a popular choice for home and small business users.