Yes. 5xx codes are server errors: The server failed to fulfil a valid-looking request.

5xx · Server error

HTTP 507 Insufficient Storage

The server can't store what's needed to complete the request (WebDAV). Often a full disk.

Example response

HTTP

HTTP/1.1 507 Insufficient Storage
Content-Type: application/json; charset=utf-8

{ "error": "Insufficient Storage" }

Look up the headers shown here in the HTTP headers reference.

What does HTTP 507 mean?: Insufficient Storage. The server can't store what's needed to complete the request (WebDAV). Often a full disk.
Is 507 an error?: Yes. 5xx codes are server errors: The server failed to fulfil a valid-looking request.