Disk usage incorrect

[PegLegDreg]

Is there any reason why the 'used' is wildly out of sync? I've got more music downloaded than 26.91GB alone. Is this a common bug?

 

[Fishrrman]

Yes.
A common "bug" ...

That display is often unreliable.
Use other methods to determine how space is being used.

 

[theapplehead]

I’d suggest daisy disk as I’ve found it to be quite useful in determining exactly what my storage is and deleting things I don’t need. Alternatively if you’re looking to stay on macOS storage view, I’d recommend making sure your Mac is on the latest OS and do a restart of the device just to be safe