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HTTP Status Code
507 Insufficient Storage
Server ErrorThe server cannot store the representation needed to complete the request.
HTTP status code reference, response example, common causes, fixes, and related status codes.
What does HTTP 507 Insufficient Storage mean?
HTTP 507 Insufficient Storage is a status code sent by a server to indicate the result of an HTTP request.
Status codes help browsers, APIs, apps, and backend systems understand whether a request succeeded, failed, was redirected, or needs additional action.
In practice, HTTP 507 Insufficient Storage usually appears when a server responds under specific request, validation, permission, or infrastructure conditions.
Response example
HTTP/1.1 507 Insufficient Storage
HTTP example
HTTP/1.1 507 Insufficient Storage
Common causes
- Server disk or storage quota is full
- WebDAV write operation exceeds available space
- File upload exceeds server-side storage limits
How to fix it
- Free up server-side storage space
- Increase storage quota or limits
- Delete old or unused files before retrying
Common mistakes
- Assuming the status code alone explains the full backend issue
- Ignoring related response headers that add important context
- Treating temporary errors as permanent failures
- Retrying too aggressively without checking the cause
- Debugging the frontend only when the problem is server-side
How browsers and APIs use it
Browsers, APIs, and backend services use HTTP status codes to understand the outcome of a request. Depending on the status code, an application may render content, retry a request, redirect the user, show an error, or trigger a different flow in the client or server.
Practical developer insight
507 is defined in RFC 4918 for WebDAV but is also used by some APIs and file storage services to signal that the server has run out of space. Unlike 413 Payload Too Large, the issue is on the server side, not the request size.
Client-side example
if (response.status === 507) {
console.error("Server storage full — cannot complete the request.");
}