MyCloudEx2 Ultra pas visible quand connecté à mon PC

If your WD My Cloud EX2 Ultra is not visible when connected directly to your PC, the problem can be confusing, especially if the NAS works normally when connected to your router. A direct Ethernet connection is different from a normal home-network setup because the computer and NAS must establish their own local network communication.

A similar issue was reported in the WD Community, where a user explained that the My Cloud EX2 Ultra was visible when connected through the router, but disappeared when connected directly to a Windows 11 laptop. The user could still ping the My Cloud, but Windows network discovery and ARP information did not show the expected device.

The good news is that this does not automatically indicate a failed NAS or damaged hard drives. Network discovery, DHCP, Windows services, firewall settings, IP addressing, and SMB compatibility can all affect whether the EX2 Ultra appears in File Explorer.

Why Is My WD My Cloud EX2 Ultra Not Showing on My PC?

Several issues can cause a My Cloud EX2 Ultra to disappear when connected directly to a computer.

Common causes include:

Windows Network Discovery is disabled

The computer network is configured as Public instead of Private

The PC and NAS are not receiving compatible IP addresses

DHCP is not assigning an address correctly

Windows discovery services are stopped

Firewall software is blocking network discovery

SMB configuration is incompatible

The router normally provides DHCP, but the direct connection does not

A Windows update or system restore changed networking settings

The Ethernet cable or network adapter is malfunctioning

AP isolation or similar router security settings are interfering

The NAS has retained an unexpected network configuration

Western Digital specifically notes that when a My Cloud is connected directly to a computer, both the My Cloud and computer should be configured for DHCP, and Windows Network Discovery should be enabled.

1. Understand the Difference Between Router and Direct Connection

When your EX2 Ultra is connected to your router, the router normally acts as the network's DHCP server. It can automatically provide IP addresses to both your PC and NAS.

For example, the router might assign an address such as:

192.168.1.20

to the NAS and another address such as:

192.168.1.25

to your PC.

Both devices can then communicate on the same local network.

When you connect the EX2 Ultra directly to your laptop, the router is no longer automatically providing that network infrastructure. This can result in an IP-addressing problem.

Therefore, a NAS that works perfectly behind the router may not immediately appear when plugged directly into a computer.

2. Check the Ethernet Cable

Start with the simplest possibility: the physical network connection.

Connect the Ethernet cable securely to the EX2 Ultra and the PC.

If possible, try another Ethernet cable.

Also check the Ethernet port indicators on the NAS and computer. A link light can indicate that the physical connection is active.

If the computer does not recognize any Ethernet connection at all, investigate the network adapter, cable, or NAS Ethernet port before changing Windows settings.

3. Check Windows Network Profile

Windows treats Private and Public networks differently.

For a home or trusted direct connection, make sure the Ethernet network is configured appropriately for local device discovery.

A Public network profile can prevent Windows from discovering other devices.

Open Windows network settings and check the Ethernet connection's network profile.

If appropriate, set the connection to Private.

Western Digital's instructions explain that Network Discovery is normally enabled for private networks and disabled for public networks.

4. Turn On Network Discovery

If the EX2 Ultra does not appear under Network in File Explorer, check Windows Network Discovery.

Open File Explorer and select Network.

If Windows reports that Network Discovery is turned off, select the option to enable Network Discovery and File Sharing.

You can also find Network Discovery through Windows network-sharing settings.

Western Digital recommends enabling Network Discovery when Windows cannot detect a My Cloud device on the local network.

Remember that a device can sometimes be reachable by its IP address even when it does not appear automatically under the Network section.

5. Start Windows Discovery Services

Windows relies on specific services to discover network devices.

Two important services are:

Function Discovery Provider Host

Function Discovery Resource Publication

Open the Windows Services application.

Locate Function Discovery Provider Host, open its properties, and set the startup type to Automatic (Delayed Start). Make sure the service is running.

Then locate Function Discovery Resource Publication and configure it similarly.

Western Digital specifically recommends these services for My Cloud devices that do not appear in Windows Network.

After changing the services, restart Windows and check File Explorer again.

6. Try Accessing the EX2 Ultra Directly

Do not rely only on the Network section of File Explorer.

Western Digital notes that Windows 10 and Windows 11 may not display My Cloud devices through traditional Network browsing because Network Browse functionality has changed. Mapping the network drive is recommended instead.

For the EX2 Ultra, the standard network name is:

\\MYCLOUDEX2ULTRA

Try entering the network path directly into File Explorer's address bar.

If the device name does not work, you can try using its IP address if you know it.

For example:

\\192.168.1.20

The exact IP address will depend on your network configuration.

7. Check the EX2 Ultra's IP Address

If you can ping the My Cloud but it does not appear in File Explorer, this is an important clue.

It suggests that basic network communication may be working even though Windows discovery is not.

The original WD Community discussion describes a similar situation: the user could ping the My Cloud EX2 Ultra but could not find the expected WD NAS MAC information through arp -a.

Check your computer's Ethernet IP address using Windows Command Prompt.

You can use:

ipconfig

Look for the Ethernet adapter's IPv4 address.

If the PC has an address such as 169.254.x.x, Windows may have assigned itself an automatic private address because it did not receive a DHCP address.

That can be a sign that the direct connection does not have a functioning DHCP server.

8. Direct Connections and DHCP

This is one of the most important considerations when connecting a My Cloud directly to a PC.

Western Digital states that when connecting a My Cloud directly to a computer, the My Cloud and computer should be configured for DHCP. A crossover cable is not required for supported Ethernet connections.

If both devices are configured to use DHCP but there is no DHCP server on the direct connection, they may not obtain addresses that allow normal communication.

If you are comfortable with advanced networking, you can configure a suitable static IP arrangement temporarily. However, do not randomly assign addresses because an incorrect subnet configuration can make the problem worse.

For most users, reconnecting the My Cloud to the router is the simpler and safer approach.

9. Connect the My Cloud Through the Router

If the direct connection continues to fail, reconnect the EX2 Ultra to your normal router.

This is generally the preferred configuration for a network-attached storage device because the router provides network management and DHCP.

Once the NAS is connected to the router, connect your PC to the same network.

Then try:

\\MYCLOUDEX2ULTRA

If the device works normally through the router, the NAS itself is probably functioning and the problem is more likely related to the direct PC-to-NAS network configuration.

10. Check Firewall and Security Software

Windows Firewall or third-party security software can interfere with network discovery.

If Network Discovery is enabled but the NAS remains inaccessible, review your firewall settings.

Do not permanently disable security software simply to make the NAS visible.

If you temporarily disable a firewall for diagnostic purposes, restore it immediately afterward.

Western Digital also identifies firewall and network-discovery settings as possible causes of network access problems.

11. Do Not Immediately Enable SMB 1.0

Many older troubleshooting guides recommend enabling SMB 1.0/CIFS when a WD My Cloud does not appear in Windows.

However, this should not be your first solution.

Western Digital explicitly warns that enabling SMB 1.0 reduces Windows security and recommends mapping the drive using its IP address instead where possible.

For newer My Cloud OS 5 configurations, Western Digital states that SMBv1 is not required for network discovery.

Therefore, do not enable SMBv1 simply because the NAS icon is missing from File Explorer.

12. Check Router Isolation Settings

If the EX2 Ultra works through the router but cannot be accessed by some devices, check whether the router has isolation features enabled.

Modern routers may include settings such as:

AP Isolation

Client Isolation

WLAN Partition

Guest Network isolation

These features can prevent devices from communicating with one another.

Western Digital explains that AP Isolation, Client Isolation, Guest Mode, and WLAN Partition can prevent computers and NAS devices from seeing each other on a network.

For a direct PC-to-NAS connection, these router settings generally will not be relevant, but they are worth checking when you return the EX2 Ultra to your normal network.

13. Consider a Recent Windows Restore or Update

The issue described in the WD Community discussion is particularly interesting because the direct connection had reportedly worked before a Windows 11 system restore.

A Windows restore or update can potentially change:

Network adapter settings

Firewall rules

Network profile

Discovery services

SMB configuration

TCP/IP settings

If your EX2 Ultra stopped appearing immediately after a Windows change, review these settings carefully.

14. Try Another Computer

If possible, connect the EX2 Ultra to another computer.

This is a useful diagnostic test.

If the NAS works on another computer, the original PC likely has a Windows networking, driver, firewall, or configuration problem.

If it fails on multiple computers when connected directly, investigate the NAS's network configuration, Ethernet cable, and direct-connection setup.

15. Avoid Resetting the NAS Too Quickly

A common mistake is to perform a factory reset because the device is not visible.

Do not reset the EX2 Ultra simply because Windows cannot discover it.

Network discovery problems do not necessarily indicate a problem with the hard drives or stored files.

Try network troubleshooting first.

If the device is accessible through its normal router connection, there is even less reason to perform a destructive reset.

Frequently Asked Questions

Why does my WD My Cloud EX2 Ultra work through the router but not directly on my PC?

The router normally provides DHCP and other network services. A direct Ethernet connection may not provide the same network configuration, causing the PC and NAS to have incompatible or missing IP addresses.

Why can I ping my My Cloud but not see it in File Explorer?

Ping only confirms basic IP communication. Windows Network discovery is a separate process, so a NAS can respond to ping while remaining absent from the Network section.

Does the EX2 Ultra require a crossover Ethernet cable?

No. Western Digital's direct-connection guidance states that an Ethernet crossover cable is not required.

Should I enable SMB 1.0?

Not as a first step. Western Digital warns that SMBv1 reduces Windows security and recommends using IP-based drive mapping instead where possible.

What is the easiest way to access the EX2 Ultra from Windows?

If the NAS is connected to your normal network, try accessing its network share directly using its network name or IP address rather than relying exclusively on the Windows Network browser. Western Digital provides the default EX2 Ultra network path as \\MYCLOUDEX2ULTRA.

Final Thoughts

When your WD My Cloud EX2 Ultra is not visible when connected directly to your PC, the problem is usually related to network configuration rather than storage failure.

Start by checking the Ethernet cable and Windows network profile. Enable Network Discovery and verify that the Function Discovery services are running. Then check the computer's IP address and determine whether the PC and NAS are receiving compatible network addresses.