- I always choose to "keep file" when I delete music. What I noticed is that when I re download the newer 256k version, it does so, and it also still keeps my old song in the same exact location/folder as before.
Example: I deleted Bitter Sweet Symphony, which was 128k. I chose to "keep file." After downloading the newer version, I went to the folder's location in my iTunes Music folder, and there were two files: the older, 128k mp3 version, and the newer 256k AAC version. My iTunes library simply just ignores the 128k mp3 version.
This seems like a bad idea. Not because you retain your original... but now instead of a library being maybe 40 gigs, you can potentially have 80+ gigs for the same library after Matching.