正解:D
HDD (Hard Disk Drive) is a type of storage device that uses magnetic disks to store data permanently. The physical location of the data in the database is on the HDD of the server or computer that hosts the database.
The data can be accessed by using logical structures such as tables, columns, rows, and queries.
References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 5: Database Fundamentals, page 192.