Raw data and quality lossless audio formats such as WAV, AIFF or FLAC will indeed take up users' data storage space. For those who like to listen to music on mp3 music player devices and smartphones, those formats may be inappropriate or not friendly with small data storage space. So, converting these audio formats to a smaller audio file format such as mp3 is a good choice for that. If you have a Mac, you can use FLAC To MP3 Mac free app which handles the FLAC to MP3 conversion on Mac OS very well.