Mac 2012 or Mac 2014 for Data Transfer

So I am trying to figure out which Mac Mini works best for me (either 2012 or 2014). The trouble is, I’ve got an external drive as EXFAT, where I stored music, video, and other file backups. Would these be transferred to the new Mac Mini once I connect them? What should I look for and pay attention to when I get them together?

Hello, if you’ll connect your external EXFAT drive it will act as a normal external drive like a pen-drive or so.