USB connection type pop-up not showing

The main reason I am loyal to Android is it was always easy to plug my phone into my Windows PC and transfer files. Recently, my phone is not recognized by my PC. It doesn't even give me the menu on my phone to pick what to do when connected (charge, transfer files, etc.). In the settings on my phone, everything is greyed out. I also think this is causing Android Auto not to work in my car. Others have tested their phones and can connect to the radio instantly. I have searched the settings and developer options and can not find which setting is incorrect.