Archive in SAP B1 8.81 PL06 - very small data reduction

Hi, I recently completed a data archive of 4 fiscal periods. The database size used to be 47G, and is now 44G... Not much of a data reduction in my opinion.

Can anyone lead me into a direction where I can find out why the database wasn't reduced very much? Did something not go right perhaps? I'm stumped as to why our database is so huge still... We're running very low on disk space for the DB, and so I am really hoping to trim it down as much as possible.

Thanks for any insight