Been perplexed lately why storage capacity on my MacBook Pro's internal drive seems to get used up somewhat quickly, even though I've recently offloaded movies, pictures, songs, etc. to free up storage.

Tonight, I was running Serato DJ to analyze newly added tracks. It was the only application running at the time. To check my drive capacity, I opened the Macintosh HD Info box (right-click on Macintosh HD, then select "Get Info"). Even after the analyzation process was completed, and I closed and re-opened Serato DJ, the amount of "Used" capacity (shown in bytes) is slowly increasing (using up capacity).

I let it run for several minutes, but the capacity loss did not stop until I closed Serato DJ.

Any ideas short of totally deleting the program?