A description of the SQL system databases, and also the two sample databases that come supplied with an SQL server. Also includes instructions on how to move system databases
This page discusses the different physical files used by MSSQL User databases, maximum file and database sizes, how to manage database growth, and how to group files into Database Groups
MSSQL databases can grow automatically as required, but if data is deleted from them, they do not automatically shrink. If you have a database that is wasting a lot of space, then you need to reclaim that space by shrinking it. This page details how to shrink a database.