Orphaned media
What it means
Some media files no longer match any installed table.
Why it happens
PinUP Popper's media folder (POPMedia) accumulates files over successive table installs and removals. PUPVideos is not examined: its folders are named after the PuP-Pack, not the table.
How Pincab Toolbox detects it
The name of an image, video, sound or backglass in POPMedia (after stripping any "(SCREENx)" suffix and numeric index) doesn't relate, even partially, to any installed .vpx table. Other files (.ini, .exe, .bat…) are never counted.
Automatic repair
Repair, included in the Pincab Toolbox licence, can fix this one for you. Your files are backed up first, and the fix can be undone.
Check your own pincab
Pincab Toolbox is a free Windows scanner for Visual Pinball X and PinUP Popper. It finds and explains problems like this one. No account, no telemetry.
Download for freeCovered: Visual Pinball X (10.x) and PinUP Popper. Not covered: Future Pinball, Pinball FX, Visual Pinball 9 and the other frontends (PinballX, PinballY).