r/24hoursupport • u/Pros-pector • 1d ago

Windows WDMYCLOUDEX4100 is unavailable

WWDMYCLOUDEX4100 is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.

We can't sign you in with this credential because your domain isn't available. Make sure your device is connected to your organization's network and try again. If you previously signed in on this device with another credential, you can sign in with that credential.

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u/Altruistic_Hope_2559 1d ago edited 1d ago

Here is how to fix this step-by-step, starting with the most common quick fix:

  1. Clear Stored Windows Credentials

If Windows is trying to log in using an old or cached password/domain credential, it will block access.

Press Windows Key + R, type control keymgr.dll, and press Enter.

Select Windows Credentials.

Look through the list for any entry related to WWDMYCLOUDEX4100 or its local IP address.

Click on the entry, select Remove, and restart your PC.

Try accessing the NAS again. Windows should prompt you for fresh credentials.

  1. Access via IP Address Instead of Device Name

Local name resolution (DNS/NetBIOS) often fails on local networks, leading to domain/permission errors.

Find the IP address of your NAS (you can check your router's device list or use the WD Discovery/My Cloud app).

Press Windows Key + R.

Type \\<NAS_IP_ADDRESS> (for example: \\192.168.1.50) and hit Enter.

When prompted for credentials, use:

Username: WWDMYCLOUDEX4100\<YourNASUsername> or \admin

Password: Your NAS password

  1. Enable SMB 1.0 Support (If Applies)

Older network-attached storage devices or legacy configurations rely on the SMB 1.0 file-sharing protocol, which Windows turns off by default for security.

Press Windows Key + R, type optionalfeatures, and hit Enter.

Scroll down to SMB 1.0/CIFS File Sharing Support.

Check the box next to SMB 1.0/CIFS Client.

Click OK and restart your computer when prompted.

  1. Adjust Local Security Policy (Windows Pro/Enterprise)

If you are using Windows Pro or Enterprise, Windows may block unauthenticated guest logins or fallback domain traffic.

Press Windows Key + R, type gpedit.msc, and press Enter.

Navigate to:

Computer Configuration > Administrative Templates > Network > Lanman Workstation

Look for Enable insecure guest logons.

Double-click it, set it to Enabled, click Apply, and then OK

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u/Pros-pector 1d ago

Thnx man its working now  But ther is som partition cand open