The songs I downloaded online do not show up with the same name in the player I download music from various sites offering music for free (because I lack any sort of disposable income to legitimately download them). After changing their names into ones that make sense on my computer, I load them onto a memory card and then try to play them. They play just fine but their titles seem to be totally different from what I changed them to on my computer. For example, I renamed a file to "The Chainsmokers-Closer"  on my computer, but in Google play music it reads "TERGOS. RU". What is causing this and how can I solve it? Should I format the memory card as input? Should I put the renamed files directly onto my internal memory? Re downloading the song doesn't seem to help
Google Play Music is most likely reading the MP3 tag instead of the actual filename. There are two ways to edit the MP3 tag. 

To do it on your computer, I have used in the past mp3tag. To do this from your phone, you can use the application iTag - Music Tag Editor. If you prefer neither of these methods, you would have to find a music player that does not read the MP3 tag but instead reads the filename. I use Poweramp and in the settings of that application, under Look &amp; Feel &gt; Player UI, you can set the player to read the titles from the file names.