Cloud accounts · Local folder accounts
Can I connect a WebDAV or Nextcloud server?
Short answer: WebDAV isn't an account type you can add right now. Mount the server in Finder with Connect to Server and add it as a Local folder account, use Nextcloud's synced folder, or add the server as SFTP if it offers it.
WebDAV isn't one of the account types you can add right now. Two routes work instead: mount the server in Finder with Go → Connect to Server and add the mounted folder as a Local folder account, or — if your server also offers SFTP — add it as an SFTP account.
Nextcloud's own Mac app also keeps a synced folder in Finder, which you can add as a Local folder account. SFTP is the most dependable for scheduled transfers, since it doesn't depend on a share staying mounted.