All the ongoing disk space requirements are for the SQL Database orgname_MSCRM. You can either move the database files, or add additional data files to the database.
To move the database use SQL Enterprise Manager (SQL 2000) or SQL Management Studio (SQL 2005), detach the database (you can only do this when it's not in use), move the file to a different location, then attach the database files.
These are entirely SQL operations, and independent of the fact that the database is for MS CRM