I am having trouble mounting my usb drive to my Rpi3. I followed this tutorial: http://www.makeuseof.com/tag/how-to-add-usb-storage-to-the-raspberry-pi/
But, when I add files and restart my Rpi3 it automatically deletes the files I just created on it.
I am trying to use the extra storage for projects I want to build but it would difficult with the limited amount of storage I have on the sd card.
Is there any way to resolve this issue?