This application will alert you while running of usb's that have been inserted into the linux machine.
Behind the scenes it uses the linux device manager udev to scan the system for new devices of the subsystem usb, and then looks at the action to see if it's a device being inserted into the machine.
It then uses the libnotify framework to display a message to the current user.
You will need libudev and libnotify for this application to build.
aplay is needed in the system to play audio.
Since it depends on user session to send notification, setup the service as a user:
systemctl --user link /absolute/path/to/usb-notify/systemd/usbnotify.service
systemctl --user daemon-reload
systemctl --user enable usbnotify.service
systemctl --user start usbnotify.service$ usb-notify & in your startup script (~/.xinitrc)