Insufficient Storage — the server lacks space to complete the request
What 507 Means
The 507 error on the HTTP Status-Codes indicates insufficient storage — the server lacks space to complete the request. This typically occurs due to server disk space is completely exhausted.
A 507 Insufficient Storage response is an extension of HTTP used primarily in WebDAV (Web Distributed Authoring and Versioning) environments. It indicates that the server cannot fulfill a request because it lacks the physical or virtual space to store the resulting data.
Technical Background
While 500 is a generic server error, 507 provides a specific reason: storage exhaustion. It tells the client that the server is operational, but it has no room to accept the incoming payload or create the requested resource.
This status is critical for automated systems. It allows a client to distinguish between a software crash and a resource shortage, enabling better retry logic or administrative alerting for disk management.
In modern cloud environments, 507 can also trigger when virtual storage volumes or distributed file systems experience local failures that prevent new data from being committed to persistent storage.
Common Causes
- Server disk space is completely exhausted
- Quota limits reached for the specific user or directory
- WebDAV resource limit exceeded during a file upload
Typical Scenarios
- An automated backup script fails to upload a database dump because the cloud storage volume is full
- A user attempts to save a document to a shared network drive that has reached its hard quota limit
What to Know
Free up space on the server or increase the storage quota for the affected environment. If the error occurs on a managed service, it may indicate a service-level capacity issue that requires provider intervention.
Frequently Asked Questions
Common questions about HTTP 507 error
It means the server or storage service you are using has run out of space and cannot save your file or data.