What is a characteristic of a flash drive?

A flash drive is characterized by the use of flash memory, which allows it to store data without the need for a constant power supply. This type of memory is both non-volatile and solid-state, meaning that it retains information even when the device is disconnected from a power source. Additionally, flash drives are designed to be highly portable, making them easy to carry around for data transfer and storage purposes. The compact size and light weight of flash drives contribute significantly to their convenience, allowing users to easily transport large amounts of data wherever needed.

In contrast, the other options highlight characteristics that do not apply to flash drives, such as being heavy or primarily used for internal storage, which are more aligned with different types of storage devices like hard drives.