Why did my tracks disappear? I shift-clicked the X, next to the F for saving a data block; did I just erase all the info from the solve?  I thought the tracking info was linked to the Camera, not the video clip?
Also, I moved file locations of both the .blend file and the movie clip file.  Moving the movie clip file seemed to &quot;unlink&quot; the tracks from the movie clip, I re-opened the movie clip file and it was now Movie-Clip.001, but at that point the tracks were still there, linked to the camera.
Now, after shift-clicking the X for the movie clip data block thing (and saving, closing blender, and re-opening blender), it's all gone, no tracks, no markers, the camera doesn't move or anything....  I'm going to re-track the movie clips; I just want to know what NOT to do next time.  I hope this makes sense.
To fix the file location issue I did: Outliner &gt; change the &quot;display mode&quot; to &quot;Data API&quot; instead of &quot;View Layer or &quot;Scene&quot; &gt; scroll down to Movie Clips and in there I found the file paths from Movie Clip and Movie Clip.001 and just copy/pasted Ctrl+C / Ctrl+V the correct file path.
Still not sure how to fix the deleted solve data/track data.
Best I can tell is shift-clicking the X for the Movie Clip data block (deleting the false user) and then saving the blend file permanently deletes the solve/track data and the clip must be re-tracked and re-solved.  &quot;Ten four rubber ducky. Over and out.&quot;