Downloading music to a USB Stick - How is that done?

Hello,

There was a similar question pertaining to what I am asking and, the other individual was referred to a website: videocodezone.com - which is no longer available and, is up for sale. Is there any other safe and easy to use website available as I am 67 and want to download music just to listen to in my new car that I purchased with a USB Port. I reside in an area where there aren't radio stations.

Thank you