...my stereo how to label them.? I have tried book 1 disk 1 and that seemed to work except disk 4 played last then when book 2 started it was on disk 4. I then tried putting the next disk in the previous disk folder but at the end of book one it started book 2 a few files early. Should I just label the files 1, 2 ,3. I have the whole of the Harry Potter books on one sd card but its over 1400 files so i would like to not have to relabel everything.