Final answer:
Personal computers commonly use hard disk drives (HDDs) for auxiliary storage; this is true. HDDs use magnetic storage to permanently store and retrieve data. They allow random-access to data and are a key development in digital devices.
Step-by-step explanation:
The statement is true; personal computers use hard disk drives for auxiliary storage when the computer is operating. A hard disk drive (HDD) is a data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks coated with magnetic material. This functionality is crucial as it allows computers to store a large amount of data permanently, even when the power is off.
The use of hard disk drives is a key idea in the development of digital devices, leveraging magnetic fields to encode information which can be stored or retrieved quickly. The data on a hard disk drive can be accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order rather than sequentially. HDDs are common in personal computers, although solid-state drives (SSDs) are also popular due to their faster data access speeds.