I have some old music CDs and I want to backup them before they stop working completely.
I know how to backup them technically but I am not sure whether to backup them as images or copy the music files to hard drive.
If you have 'real' music CDs (CD-DA) you can't just copy the files. There are no files, or if there are, they don't contain the real data.
I recommend you rip the CD (i.e. converting the audio data to real files) and use a lossless audio codec for this. FLAC is a very good one. This way you don't loose any quality compared to the CD and still get a good compression rate.