Download notability app on your computer and then put all the powerpoints on there. Notability can record lectures and you can easily find the audio to any slide you typed on. This is much easier than going though lecture recordings when you wanna hear more about some details you missed/didnt understand on one slide. having easy access to audio recordings is extremely important when studying for exams when you're short on time. After just finishing up my first two years and using this, I don't think there is a better way to go!