Which statement accurately describes an external storage device's convenience?

An external storage device's convenience is accurately described by its ease of removal and portability. These devices, such as external hard drives, USB flash drives, and SD cards, are designed to connect to a computer or other devices through ports like USB or Thunderbolt. This design allows users to easily transfer data between different systems or take their data with them on the go.

This portability means users can back up their important files or transport them from one location to another without relying on the device's internal storage. The ability to easily connect and disconnect these devices makes them very user-friendly, especially for those who need to manage large amounts of data across multiple devices.

The other choices do not accurately capture the core advantage of external storage. A permanently attached device would be regarded as internal storage, which lacks flexibility. The idea that external storage cannot store large amounts of data is misleading, as many external devices can hold significant amounts of information. Lastly, stating that it is primarily for internal use contradicts its very nature, as external storage is meant to be used outside the primary device.