I want to download approx. 4-8 royalty free music. Is there any way to download them with software or from any websites.

I am waiting for your reply.

 

Here are a couple of search results that link to subscription-free and royalty-free music.
In other words free free music.
I give the sites that list some because a few require attribution and some included paid music as well, and the listing articles give info on that.
https://vidooly.com/blog/youtube-royalty-free-music-sites-for-creators/
https://www.adweek.com/digital/royalty-free-music/
There are more but that is a start.

 

You can try Music Downloader software to download royalty free musics plus other types of music and songs without any hassle. This is paid software but I must say that it has many feature other than just download like , 1 - click transfer of musics to iTunes library, 1-click iTunes duplication fixes and many more.