What is a "WMA"?
WMA is very similar to MP3s. In my estimation, the quality is not as good as MP3s. The size is about half of MP3 size. It was a Windows media format and has really proliferated more on the Windows platform. The Macintosh platform really rarely sees WMA files unless it's a website. And in that case, you can use Windows Media Player, or there's a or there's a program for Macintosh called Flip for Mac that allows the normal QuickTime player on the Macintosh to read Windows Media Player files.