Popular lossy files are the MP3, aiff, and wma types. The table below gives you an example of the different file sizes for the most common formats.

Normally, if you change a file’s extension in Windows, it doesn’t do anything positive. It just makes the file open in the wrong programs that can’t decode what’s inside.

Audio format guide: MP3, M4A, AAC, FLAC, and more From MP3 to FLAC, here's what you need to know about audio file formats and what they have to do with streaming music.