# 507 Insufficient Storage

> The server is unable to store the representation needed to complete the request.

Source: https://apiguide.dev/status-codes/507
Class: server-error
Defined in: RFC 4918 <https://www.rfc-editor.org/rfc/rfc4918.html>
Updated: 2026-07-09

## What does HTTP status code 507 mean?

The 507 Insufficient Storage status code (WebDAV, RFC 4918) indicates that the server cannot complete the request because it lacks disk space.

## When to use it in APIs

Useful for storage or upload APIs to explicitly notify users that a file upload was rejected because the server has run out of physical disk space.

## How it compares to other codes

* **500 Internal Server Error**: Generic failure. 507 points directly to storage limit issues.