What type of storage uses spinning disks?

The correct answer is HDD, which stands for Hard Disk Drive. HDDs use spinning disks to read and write data. These disks, often referred to as platters, are coated with magnetic material and rotate at high speeds, allowing a read/write head to access different parts of the disk as it spins. This mechanical movement is what distinguishes HDDs from other forms of storage.

In contrast, SSDs (Solid State Drives) utilize flash memory and have no moving parts, which allows for faster data access speeds. RAM (Random Access Memory) is a volatile memory used for temporary storage while a computer is running, and it also does not involve spinning disks. Flash drives similarly rely on flash memory technology without any spinning components, further differentiating them from HDDs. Therefore, HDD is the only type listed that utilizes spinning disks for data storage.