Mapping a network drive assigns a drive letter to a shared folder so it behaves like a local disk in File Explorer and in applications. A consistent drive letter makes shared storage easier to reach from shortcuts, scripts, and line-of-business apps.
Windows maps drives over SMB using a UNC path such as \\fileserver\department. The mapping is stored per user and shown under This PC, and it can be restored automatically at sign-in when Reconnect at sign-in is enabled.
Successful mapping depends on share permissions, network reachability, and the credentials used for the connection. Cached credentials or existing connections to the same server can cause authentication failures until cleared, and off-site access may require a VPN before internal file servers are reachable.
On Windows 10, open the Computer tab and select Map network drive.
\\fileserver\department
Use a UNC path (\\server\share) rather than a web URL, and include subfolders when needed (\\server\share\folder).
Existing connections to the same server using different credentials can block mapping until the old connection or cached credentials are removed.
Use DOMAIN\username, username@domain, or SERVER\username when the default Windows sign-in does not have access.
Selecting Remember my credentials caches the password in Windows Credential Manager and can grant future access from the same Windows account.
Opening the mapped drive is the quickest proof the connection and permissions are working; a repeated credential prompt usually indicates incorrect or cached credentials.