SD card formatting


AC Question

I have a 16GB SD card currently in my phone has over 1600+ songs alone. I recently got a 64GB SD card it is a Micro SDHC Class 10 64GB card to be more specific when i did a file transfer it was about 10GB (the 64GB card was formatted to Exfat). When i placed all the music on my computer everything transfers fine and is orderly. When i transfer it to my 64 GB card from my computer and plug it into my phone it only transfers about 600 songs to my phone and also half of the songs will NOT play and they will be missing information such as artist and title. Does anyone know what i'm doing wrong here because i recently did this process with my 8GB to 16GB micro SD card and had no problems. Please help if possible

Galaxy S5 user