What does a constantly blinking LED activity light on a storage device indicate?

A constantly blinking LED activity light on a storage device is an indication of high disk read and write activity. This behavior typically signals that the device is actively processing data, which can include tasks such as opening files, saving new data, or running applications that require access to the hard drive.

The blinking light is designed to provide visual feedback to the user that the storage device is busy. In many cases, continuous blinking can also occur during heavy data transfers or system operations, such as software updates or backups. This activity is normal and expected, demonstrating that the device is functioning properly and engaged in its intended operations.

Other signals like a solid light often indicate that the device is powered and ready, but should not be confused with the busy state represented by the blinking light.