Which hard drive technology uses spinning platters coated with magnetic material?

Correct answer: HDD (Hard Disk Drive)

Option C is correct because a Hard Disk Drive (HDD) is defined by its use of rapidly spinning platters coated with a ferromagnetic material, where read/write heads float nanometers above the surface to magnetically encode and retrieve data. Option A (NVMe) is wrong because NVMe is a communication protocol for solid-state storage that connects via PCIe, using NAND flash memory with no moving parts. Option B (SSD) is wrong because SSDs store data in NAND flash memory cells, have no spinning platters or mechanical read/write heads, and are non-volatile electronic storage. Option D (flash memory) is wrong because flash memory is the semiconductor-based storage technology used inside SSDs and USB drives, not a magnetic platter-based technology.