This is a quick note to remind me where the song cache for Rock Band 3 is located on my Xbox, should I ever need to delete it again.
Goto Settings, System and then Storage. Select Memory Unit, Games and Apps and then Rock Band 3. Select the Rock Band 3 Song Cache and then choose Delete.
Note: Some other settings may also be lost (scores).
I used this to troubleshoot a custom song issue where a group of songs packaged with C3 Con Tools Video Preparer would not overwrite with newly packaged songs.
Note to self: Video Preparer is only for songs with stems!
Update: It turns out that I did not need to delete my song cache. Rather, I should have updated the file name and song ID of new versions of the songs before loading them onto the Xbox.