Using Windows Explorer
Right-click on Computer entry and select Map network drive…. Choose a local network drive to map ownCloud to. Finally, enter the address to your ownCloud instance, followed by /remote.php/webdav, e.g.
for an SSL protected server. Check Reconnect at logon to make this mapping persistent across reboots. If you want to connect as another user, check Connect using different credentials.
Mapping WebDAV on Windows Explorer.
After pressing Finish, Windows Explorer will map the network drive and your ownCloud instance should be available
via Accessing your Files (WebDav) — ownCloud User Manual 5.0 documentation.