Which of the following media types is not hot swappable?

The DVD drive with an IDE interface is not hot swappable due to the nature of IDE connections. Hot swapping refers to the ability to replace or add devices without having to turn off the system. IDE (Integrated Drive Electronics) interfaces typically require the system to be powered down to safely connect or disconnect the drive. This is because the IDE connection does not support the electrical requirements needed for safe disconnection while the system is running, which can lead to data loss or hardware damage.

In contrast, USB flash drives and external hard drives are designed for hot swapping; they use USB technology that supports connecting and disconnecting devices safely while the computer is powered on. SATA hard drives can also be hot swapped if connected to a SATA controller that supports this feature, allowing for easy replacement or upgrades without a system shutdown. Therefore, the unique characteristics of the IDE interface make the DVD drive the only type among the options listed that does not support hot swapping.