Backing up WMA encrypted songs

Well.. I suddenly found myself with 200-300 songs purchased, realizing I'm going to want to back them up in case my computer crashes or some sort of tragedy like that. Only thing is.. the only way I know to back up my purchased songs is by burning them as audio CD's, one by one..... I'd do a data CD, but you know how the encrypted files are. So.. Is there a way I can store my audio files on fewer CD's, saving myself a good stack of them?

Thanks