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WebDAV

Mount any WebDAV server as a Windows drive — a NAS, Nextcloud, or any other server that speaks WebDAV over HTTP or HTTPS.

Before you begin

Prepare the following in advance:

  • The WebDAV service must be enabled on the server:
    • Synology — WebDAV Server package
    • QNAP
    • ASUSTOR
    • Nextcloud — WebDAV is always on; the URL is https://<host>/remote.php/dav/files/<username>/
  • The server address (hostname or IP) and port. For access from outside your network, a DDNS hostname is the usual approach — Synology, QNAP, and ASUSTOR each offer a built-in DDNS service.
  • A user account on the server, unless the server allows anonymous access.

Help from Synology

Help from QNAP

Help from ASUSTOR

Connect

  1. Click Add in the toolbar.
  2. Choose NAS → WebDAV.
  3. Select https (recommended) or http, and enter the server address and port.
  4. Optionally enter a path to mount a subfolder as the drive root.
  5. Enter the username and password, or tick Anonymous.
  6. For https, pick the TLS/SSL version matching your server's setting, choose a timeout if needed, and click Connect.

WebDAV connection dialog

Settings

Setting Description Default
Protocol https or http https
Address / Port Server host and WebDAV port (Synology default: 5006 https) —
Path Server folder mounted as the drive root server root
Anonymous Connect without credentials off
TLS/SSL TLS version used for https auto
Timeout Seconds to wait for a server response —
Read-only Blocks writes to the mounted drive off

Alternate address

Click the + next to Address to add a second line for a backup server address. The path stays the same as the primary address. If RaiDrive cannot connect with the primary address, it tries the alternate address automatically.

WebDAV dialog with an alternate address on the line below the primary address

Behavior & limits

  • Performance depends heavily on the server's WebDAV implementation; NAS devices are typically slower over WebDAV than over SFTP.
  • If the server's TLS compatibility level is set to modern, old TLS versions are rejected — match the TLS/SSL setting to the server.
  • Keeping the original Date modified when copying works on most WebDAV servers (Synology, QNAP, TerraMaster, Zyxel, Nextcloud) but not on all — ipTIME and ASUSTOR do not support it.

Troubleshooting

Symptom Cause Fix
Connection refused WebDAV service not enabled, or wrong port Enable the service; check http vs https port
TLS handshake fails TLS version mismatch with server policy Pick the TLS/SSL version the server accepts
Works on LAN, fails outside Router/firewall not forwarding the port Forward the WebDAV port; use a DDNS hostname
Slow directory listing Deep folders over a slow server Raise the timeout; consider SFTP if the NAS supports it
Large uploads fail with error 413 The WebDAV server limits request size Raise the upload/body-size limit on the server (NAS or reverse proxy) — see forum thread
A saved document appears as 0 bytes Bug in builds before 2023.9.119 (fixed since) Update RaiDrive to the current version