So, where is the alternative to deleting the files because they are basically useless to you ? You could try some programs that rip the DRM out of the music files to be able to transfer and use the music on your new mp3 player. Please note that using those programs might be illegal in the country where you are living, make sure you know what you are doing before downloading and using them. Not that someone would be able to find out.. The world needs more disclaimers like this, don’t you think ?
The first program that is able to remove the DRM is QTFairUse. It can be downloaded from Rapidshare, the link was published on the forum thread that I linked to. The second tool is myFairTunes which does the same and converts the mp4 file to mp3 as well. I do not think that it makes much of a difference which program you will be using. I suggest you download one and if it does everything the way you want it you stick with that.

I don’t need them at all because I do not buy music, videos or other media in stores that add DRM to the files or demand a ridiculous amount of money for the media.