[SOLVED]Remove All Certain Files From a Folder

My music folder on my computer has a lot of songs and most are from , I would like to know if there’s a program that can delete all the .txt + .html and other various files that are used to advertise and NOT .mp3 from a folder, since I have so many folders, it would take hours to go through and delete them all. Anyone know a program, if they do please give link + thanks.
Answer #1
Window search. Look only in your mp3 folder for txt or html, then delete the results.
Answer #2
An alternative way would be using the command line
Hit winkey+r
Type cmd and hit enter
Type “del full path of the topmost folder\*.txt /s” (without the quotes) and hit enter. (i.e. del C:\music\*.txt /s)
You can simply replace the txt extension to html.
Answer #3
Thank you