Can't use libraries

I've been using my arduino but its not detecting some libraries I've been downloading here's the error message:
Arduino: 1.8.0 (Windows 10), Board: "Arduino/Genuino Uno"

C:\Users\User\Desktop\Elgoo code\code\Lesson 10 Ultrasonic Sensor Module\SR04_Example\SR04_Example.ino:3:18: fatal error: SRO4.h: No such file or directory

#include <SRO4.h>

^

compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

The libraries are on my desktop