I understand that we have to keep the file structure unchanged for our data files (shapefiles, etc.), so our project files can find them. But I had no idea that a similar thing may apply to the locations of our QGIS project files. I recently "reorganized" some of my computer files (not including my data files), and found that upon opening a project, I had to tell it where to find all the data files. Is that correct, or am I missing something?