Answer:
USB flash drive
Step-by-step explanation:
Safely remove hardware icon enables to dismount the file system. This prevents any more operations (read/write) for the external drive.
The operating system is instructed by this icon to wait for all processes accessing a file system to finish so that the file system can be dismounted.
For USB flash drive, the Safely Remove Hardware icon can be used to stop the device's operation before removing it from the computer