To map a drive in Windows 10 Pro, follow these steps:

1. Click the Start button and select "This PC" or "Computer"
2. Click the "Map network drive" button in the ribbon menu at the top.
3. In the "Drive" field, select the letter of the drive you want to use for the mapped drive.
4. In the "Folder" field, enter the path of the network location you want to map to, or click the "Browse" button to navigate to it.
5. Select the "Reconnect at sign-in" check box if you want the mapped drive to automatically reconnect every time you log in.
6. Select the "Connect using different credentials" check box if the network location requires a different username and password than your Windows login credentials.
7. Click the "Finish" button.

The mapped drive should now appear in the "This PC" or "Computer" window and can be accessed like any other drive on your computer.