SCOM Operations Manager database question

Hi,

I have a SCOM operational database with around 500GB space on a separate server. When I see the files on the server for database, I can see multiple files for the database. Can someone explain me is there any retention policy applies when data file reaches to some limit on the database ?

I'm little confused here.

Also, I got the below output when I ran the SQL query against Operations Database.

I see size of the database is 525054.81 MB and space available is 380171.44 MB when click the properties of database. It would be great understanding if someone explains about this.

Thanks,

Ramu Chittiprolu