How do you “Attach” a database to SQL server?

Follow these steps (as Administrator):

• Copy the .mdf/.ldf files to a local drive on the SQL Server machine
• Open a SQL query window from SQL Server Management Studio Express (SSMS)
• sp_attach_db 'AceMapper','c:\db\AceMapper.mdf','c:\db\AceMapper.ldf'

Change the path names for the last command as necessary. You may need to right-click and run SSMS as Administrator.

⚠️Note: for performance reasons, it is often a good idea to put the mdf and ldf on separate disks.