I transfer files (mainly mp3's, .wav's) from my Windows 10 PC to my phone all the time. I will right click on the file on the desktop, then "Send to" my phone, which is always right there where it should be in the list. Now suddenly, the phone will not show up (in either the right click menu or on File Explorer.) I've tried restarting/rebooting both PC and phone, tried 3 different cables (USB to C), nothing doing. I have no clue what's wrong, and this is something I use constantly. Any ideas?