Hi. So my s4 was experiencing slowdowns and issues so I decided to factory reset and restore it. I had backed up what I thought was literally everything to my pc (everything in my 'card' and 'phone' folder). After waiting hours for gigs of data to be backed up I restored my phone. However many of the mp3 files that I have downloaded in the past few months are gone (mp3s in which I converted from youtube videos) I just simply to not see those songs showing up in my folder. Is there any way I can get these back without having to convert those hundreds of songs again? Or do they just not show up because it wasn't music that I bought from google? There must be a better way to back up all those files. Also a lot of my contacts have gone missing as well. I'd appreciate the feedback, thanks.