You or your database administrators will probably have access to the SQL Server Management Studio (SSMS) application. This permits the user to define housekeeping activity for SQL Server, including the backup of a database on a regular basis.
The simplest action is to perform a daily backup of the entire Capacity Database, which will result in a single Windows file being created that could be used to recover the database if necessary.
Another activity that may benefit performance longer term is to perform a “shrink” on the database to remove excess space and reorganize indexes to be more efficient. You can also schedule this from SSMS. A weekly or monthly run of a shrink should keep your database in good working order.
If you use other software you should consult that product’s documentation to help you set up the backup regime you require.