- Copy your backup .bak file in the following location of your pc : C:\Program Files\Microsoft SQL Server\MSSQL11.SQLEXPRESS\MSSQL\DATA
- Connect to a server you want to store your DB
- Right-click Database
- Click Restore
- Choose the Device radio button under the source section
- Click Add.
- Navigate to the path where your .bak file is stored, select it and click OK
- Enter the destination of your DB
- Enter the name by which you want to store your DB
- Click OK
The above solutions missed out on where to keep your backup (.bak) file. This should do the trick. It worked for me.