How to Access UGREEN NAS Files via WebDAV

This guide shows you how to enable WebDAV on your UGREEN NAS and connect to it from a Windows or Mac computer on your local network. Once set up, your NAS shared folders appear as a mapped network drive on your computer — you can open, edit, and save files directly without downloading them first.

If you want full local network speed for large media files or backups, SMB is faster. If you want access from outside your home network, that’s a different setup — see our UGREEN NAS remote access guide.

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Prerequisites

Setting up WebDAV on a UGREEN NAS is straightforward once a few requirements are in place. Checking these early saves time and prevents configuration issues later:

• Confirm that the NAS has stable network access.
• User accounts and permissions should be prepared on the NAS in advance.
• For secure connections, consider preparing an SSL certificate. Using HTTPS instead of HTTP prevents data from being exposed during transfer.

Enabling the WebDAV Service on UGREEN NAS

1. Open the [Control Panel] application in the UGOS Pro system, select [File Service], then click on [WebDAV].
2. Check the option to enable “WebDAV Service.”
3. Click the [Apply] button to save the settings.

UGREEN NAS Tip: If you need to change the default port, you can adjust it in [Advanced Settings]. The default HTTP port is 5005, and the default HTTPS port is 5006.

Mounting the WebDAV Service

To mount the WebDAV service, use one of the following addresses:

• http://NAS_IP:5005
• https://NAS_IP:5006

Replace NAS_IP with the actual IP address of your NAS. For example: http://172.17.70.242:5005.

To check the NAS IP address

• In the [Control Panel], go to [Network].
• Click [Network Connection] to view the IP address of your NAS device.

Connecting to UGOS Pro via WebDAV on Windows

1. Ensure that your computer and UGREEN NAS are on the same local network.
2. Press Win + E to open File Explorer on your Windows computer.
3. In File Explorer, click the “This PC” tab, then select “Map Network Drive.”
4. Enter the WebDAV address. In the “Folder” field, input the WebDAV address of your UGREEN NAS.
5. Check the option “Reconnect at sign-in,” then click “Finish.”
6. Enter your credentials. Input the username and password you created on the UGREEN NAS to complete the connection.
7. After a successful connection, the shared folders on your UGREEN NAS will appear under “This PC.”

Connecting to UGOS Pro via WebDAV on macOS

1. Ensure that your computer and UGREEN NAS are on the same local network. Y
2. Click the Finder icon on your desktop to open Finder.
3. In the Finder menu bar, click “Go,” then select “Connect to Server.”
4. Enter the WebDAV address. In the “Server Address” field, input the WebDAV address of your UGREEN NAS.
5. Enter your credentials. Input the username and password you created on the UGREEN NAS, then click “Connect.”
6. After a successful connection, the shared folders on your UGREEN NAS will appear in the “Locations” section of Finder.

Secure Your Connection

Accessing NAS files through plain HTTP leaves data exposed. Every transfer, from a single document to a large media file, can potentially be intercepted. To protect both privacy and security, WebDAV should always run over HTTPS.

Once HTTPS is enabled, Customize the port numbers for HTTP and HTTPS services to avoid conflicts with other service ports. By default, HTTP typically uses port 5005, and HTTPS uses port 5006. You can change these to other ports based on your network configuration needs.

Enable and Log WebDAV Logs

You can choose to enable WebDAV logging to track and analyze access records for the WebDAV service in detail.

go to the [Log Center] app. After opening the Log Center, change the log type from “Event Log” to “Transfer Log” under [Logs] > [Current Logs] to view the transfer logs.

If you made changes to the settings, click “Save” to save the changes, then click “Apply” to make the new settings take effect.

Common Errors and How to Fix Them

WebDAV connection problems on a UGREEN NAS usually fall into a small number of recurring causes. Work through these in order — the early ones are more common than the later ones.

Windows Map Network Drive Fails on HTTP

If you try to map your UGREEN NAS via WebDAV in Windows File Explorer using http://NAS_IP:5005 and the connection fails with errors like “the folder you entered does not appear to be valid” or “0x80070043,” the cause is Windows’ built-in WebDAV client. By default, Windows refuses HTTP connections to WebDAV servers and accepts only HTTPS.

Two ways to fix it:

• Recommended: Enable HTTPS on the UGREEN NAS WebDAV service and connect via https://NAS_IP:5006 instead.
• Alternative for local network testing only: Edit the Windows registry to allow HTTP. Open regedit, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters, set BasicAuthLevel to 2, then restart the WebClient service. Don’t do this on a machine that ever connects to WebDAV outside your home network.

If HTTP works in a third-party client like RaiDrive or NetDrive but fails in File Explorer, this Windows restriction is almost always why.

HTTPS Connection Fails Even Though the Browser Works

If your browser connects to https://NAS_IP:5006 successfully but a WebDAV client (Windows File Explorer, Total Commander, or similar) fails with certificate errors, the issue is usually the SSL certificate.

Browsers let you click through self-signed certificate warnings. Most WebDAV clients don’t — they fail silently or with cryptic error codes. The fix is to use a proper certificate rather than the self-signed one UGOS Pro generates by default. Two paths:

• Apply a Let’s Encrypt certificate to your UGREEN NAS through Control Panel, and connect via the matching domain name rather than the IP address. Your certificate is only valid for the domain it was issued to.
• Trust the self-signed certificate manually by exporting it from the UGREEN NAS Control Panel and importing it into your operating system’s trusted certificate store. This works but needs to be repeated on every client device.

Connecting via IP address with a domain-issued certificate will fail even if the certificate itself is valid. The certificate name must match the address you’re connecting to.

Cannot Find the NAS on the Network

If your computer can’t reach the WebDAV server at all (timeouts, “could not connect” errors), confirm the basics before assuming WebDAV is broken:

• Open http://NAS_IP in a browser. If the UGOS Pro web interface doesn’t load, the network path itself is broken — WebDAV won’t work until that’s fixed.
• Confirm the WebDAV service is enabled in Control Panel → File Service → WebDAV and that the Apply button was clicked after enabling.
• Confirm you’re using the right port. Default HTTP is 5005, default HTTPS is 5006. If you changed the ports in Advanced Settings, use your custom values.
• If your computer and NAS are on different VLANs or subnets (common on guest Wi-Fi networks), WebDAV traffic may be blocked at the router level.

Authentication Errors

“Username or password incorrect” errors typically come from one of two causes:

• The user account doesn’t have permission to access the specific shared folder you’re trying to reach. Check the folder’s permissions in Control Panel → Shared Folder and confirm the user has at least read access.
• Special characters in the password are being mishandled by the client. Some WebDAV clients have trouble with @, #, or other characters in passwords. If you suspect this, test with a temporary user account that has a simple alphanumeric password.

Files Show as Read-Only or Can’t Be Saved

If you can connect and see your files but can’t save changes, the cause is usually one of:

• The user account has read-only permission on the shared folder. Change to read-write in Control Panel → Shared Folder if appropriate.
• Windows’ built-in WebDAV client has a default file size limit of 50 MB. Larger uploads fail silently. To raise the limit, edit the registry value FileSizeLimitInBytes under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters to a larger value (in bytes), then restart the WebClient service. Maximum is 4 GB.
• The folder uses a filesystem feature WebDAV doesn’t expose cleanly (extended attributes, certain metadata). This is rare and usually shows up as files that save but lose specific properties.

Slow Transfers or Frequent Timeouts

WebDAV is slower than SMB by design — it adds HTTP framing overhead to every operation. If WebDAV transfers are slow but SMB transfers from the same NAS are fast, that’s expected behavior, not a malfunction. For large file transfers on the local network, use SMB instead.

If WebDAV is unusually slow even for its protocol overhead, check:

• Network: wired Ethernet on both ends is dramatically faster than Wi-Fi for sustained transfers
• NAS load: if the NAS is busy with other tasks (transcoding, backups, container apps), WebDAV throughput drops
• Client: some WebDAV clients are markedly slower than others. If one client crawls and another flies, the client is the bottleneck

Third-Party Backup Tools Fail with HTTP 405 Errors

If you’re using rclone, Cyberduck, or similar tools to sync to your UGREEN NAS via WebDAV and you see HTTP 405 (“Method Not Allowed”) errors when the tool tries to create folders, this is a known compatibility issue between UGREEN’s WebDAV implementation and clients that try to create multi-level directories in a single operation.

The fix in rclone is to enable single-level directory creation:

--webdav-nextcloud-chunk-size 0 --no-create-dir-on-rename

Or update your rclone version, since this behavior has been improved in recent releases.

For other clients, configure them to create directories one level at a time rather than batching multi-level path creation. If the client has no such option, create the destination folder manually in UGOS File Manager before the sync runs.

When None of the Above Works

If WebDAV still isn’t working after these checks, gather the following before contacting UGREEN support: UGOS Pro version, exact error message and code, client software and version, whether the failure is on HTTP or HTTPS, and whether it works locally but not remotely. Tickets with this context get resolved faster than tickets that report only “WebDAV doesn’t work.”

Conclusion

WebDAV brings the convenience of local file access to a NAS, making it simple to work with documents, media, and backups across multiple devices. With the service enabled, connections configured on Windows or macOS, and permissions properly managed, users gain a secure and flexible way to handle files without complex setups.