Strange screen/phone freezing issue.

[mugenakuma]

I recently was transferring some FLAC audio files from my PC to the "Music" folder on my AT&T LG G2 when the phone's screen turned black and the whole phone froze (I had the phone connected with a USB cable and was using the MTP file transfer setting.) I restarted the phone and it would start up fine, but after about 30-45 seconds the same thing would happen. I wiped the phone/did a factory reset and everything was working just fine, until I tried to transfer some different audio files. Once again the same issue occurred. Has anyone had a similar issue? At this point I'm afraid to transfer anything to my phone, especially audio files.