In my opinion, the easiest solution is to keep the art in the file. Then you'll never have to fuss with external files again.
MC make quick work of this.
Matt,
Yabbut...my cover art files range from a low of 2 KB to a high of 1,148 KB in size. I've got 2,173 files taking 69,427 KB, making an average of 31.95 KB per album cover image. Now, let's assume my average album (99% of my audio files are complete albums) conservatively contains 10 songs and I've got 18,697 files now (just added another album) - that makes 1,869.7 complete albums.
Since I'm only saving one image per album the way I do it now, this would make my image library approximately (1,869.7 * 31.95 KB) 59,736.7 KB - which is less than the actual 69,427 KB amount - hence my conservative estimate is fairly accurate.
If I choose to store my album art inside each file, there will be 10X more images stored per album (using the above assumption of 10 tracks per album). This would make my net image storage space 1,869.7 * 10 * 31.95 KB) 597,367 KB. Although it would be contained within audio files, the net increase of 537,631 KB or 1/2 GB is not trivial at this point (almost out of HD space - need new one). More tracks per album increase this number.
Once I get a new, larger HD purchased and installed, then the 1/2 GB becomes trivial.
Marc