Okay, after reading these posts I checked one of my tracks in Reaper and found that this is where the files are:

C:\bb\BBPlugin\SavedTracks\2021-05-17, 15-17-42\Bass - N A 1433 Bass, Electric, JazzFunkGroovin Ev16 110.wav

So based on what's said here, I can do a "Save project as..", then check the "Move all media into project directory" box, and then
all the BB files will be moved from the "C:\bb\BBPlugin\SavedTracks\ "directory" to my designated directory?

This is all good to know, I had no idea where the BB files were, I'm new to BB and hadn't thought about yet.