HTTP 507 Insufficient Storage

What HTTP 507 means

The server ran out of disk space or the user’s quota is full. It comes from WebDAV, and Nextcloud returns it when an upload exceeds the user’s quota.

Retrying

Rarely. The server can’t handle this request, so retrying it unchanged is unlikely to help.

Example response

HTTP/1.1 507 Insufficient Storage
Date: Wed, 21 Oct 2026 10:30:00 GMT
Content-Type: application/json

How to return 507

res.status(507).json({ error: 'Insufficient Storage' });

from fastapi import HTTPException

raise HTTPException(status_code=507, detail="Insufficient Storage")

http.Error(w, http.StatusText(http.StatusInsufficientStorage), http.StatusInsufficientStorage)

location /private/ {
    return 507;
}

Related status codes

• 413 Content Too Large : The request body is larger than the server allows.
• 500 Internal Server Error : The server hit an unexpected error and couldn’t complete the request.

Other 5xx status codes

500 Internal Server Error · 501 Not Implemented · 502 Bad Gateway · 503 Service Unavailable · 504 Gateway Timeout · 505 HTTP Version Not Supported · 508 Loop Detected · 511 Network Authentication Required · 520 Web Server Returned an Unknown Error · 521 Web Server Is Down · 522 Connection Timed Out · 523 Origin Is Unreachable · 524 A Timeout Occurred · 525 SSL Handshake Failed · 526 Invalid SSL Certificate

See the full list of HTTP status codes.

Sources

• RFC 4918
• IANA HTTP Status Code Registry
• MDN: 507 Insufficient Storage

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Frequently asked questions