What type of memory is often used in USB drives and SSDs?

Non-volatile flash memory is the correct type of memory used in USB drives and SSDs (Solid State Drives). This type of memory retains data even when the power is turned off, which is a critical feature for storage devices. Unlike volatile memory, such as RAM, which loses all stored information when power is lost, non-volatile flash memory allows users to save files and access them at a later time without needing a power source.

Flash memory works by electrically erasing and reprogramming data, making it highly efficient for devices that require fast read and write capabilities while maintaining data persistence. This is essential for applications where quick access and durability of data storage are important, such as in USB drives, which are often used for transferring data between devices, and SSDs, which serve as a faster alternative to traditional hard drives for storing operating systems and applications.

In contrast, other types of memory mentioned do not align with the characteristics needed for these storage devices.