How do we back up a micro sd

I need help to learn how to back up a micro sd card before formatting. Can anyone please help me?

Make a new folder on your pc desktop.. Right click>new>folder, Then hi-lite all files Left click hold... on your microsd chip and drag and drop all files into your new folder, wait untill copying of your files is finishedThen to format right click on letter drive your microsd chip is using and see format, then do a full format in fat32

Thanks a million!! :)