If you are connecting to a networked computer, in most cases you will need to provide the necessary credentials for accessing the network share. For example, this is possible when you select a backup storage. The Authentication Settings window appears automatically when you select a networked computer name.
If necessary, specify the user name and password, and then click Test connection. When the test is successfully passed, click Connect.
Troubleshooting
When you create a network share that you plan to use as a backup storage, please ensure that at least one of the following conditions is met:
You can find this setting at Control Panel —> Network and Internet —> Network and Sharing Center —> Advanced sharing settings —> Turn off password protected sharing.
Otherwise, you will not be able to connect to the shared folder.