I have a new 6S+ arriving tomorrow and I am going through my Note4 to make sure that I am not leaving anything on it. I have all the photos, videos and music covered. However, I do not fully understand the Android file system structure, and am hoping someone can point me to some of the folders that I might want to look into to check for any files I may want? I am using AirDroid and went inside some downloads folder and found some .pdf files that I deleted. 1. Where else should I check for any files? 2. I have some Snotes from my Note3 that I somehow backed up a while ago and would like to place them on my Note4 so I can export the files as .PDF or something else before I sell the Note4. Where do these files go? Thanks for any advice.