Question

complete the sentence. a(n) has moving mechanical parts, which makes it less reliable than solid - state drives, but its metal platters are sealed inside an airtight case, so it does not have problems caused by dirt and debris.

Explanation:

Hard - disk drives have moving mechanical parts like spinning platters and read - write heads. Solid - state drives have no moving parts. The metal platters of hard - disk drives are sealed in an airtight case to protect from dirt and debris.

Answer:

hard - disk drive