Step 1. In SQL Management Studio, right-click on the database name and select Tasks -> Back Up…

Step 2.  In the open window:

• Set Backup type to “Full”
• Set "Back up to:" to  “Disk”
• Leave the "Name" field as the default or change if needed.
• Click the "Add" to select the backup file destination.

Step 3. At the next window click the “…” button to open the file location window.

Step 4. Select a backup location, backup file type of "*.bak, *.tm" (should be default) and a file name – be sure to add the “.bak”  -- and click OK and each window closes.

Step 5. Click OK as each window closes and you are back to the backup window.  You will receive a confirmation that the backup was successful.