Many WebDAV clients have difficulties with the Connect Wireless. For example, newer versions of Cyberduck can connect to the device but not transfer files to or from it. Likewise, Windows 10 doesn’t seem to be able to access the drive through its built in WebDAV client (it produces an invalid folder error when trying to connect, even though the URL is valid).
I’ve had success with versions of Cyberduck (4.0 and below), the FileBrowser for iOS, and cadaver in Linux.
Why do so many clients struggle with the device? I’m hoping that future firmware updates can address this.