How to Fix 507 Insufficient Storage Error

By ErrorFix · Updated October 24, 2026 · 6 min read

What 507 Insufficient Storage means

The 507 status code comes from the WebDAV world, where it means the server cannot store the representation needed to complete a request because there is not enough free space. In practice you will also see it on shared hosting, file-sync services, and content platforms whenever an account's disk or quota fills up. The server understands your request perfectly well; it simply has nowhere to put the result.

That is why the error has such a distinctive pattern. Browsing existing pages usually keeps working, because reading needs no new storage, while uploads, saves, backups, and syncs fail on the spot. If a file upload stalls at the end, an editor refuses to save, or a sync client reports that the server is out of space, a full disk is the first thing to check, not your internet connection or your browser.

Common causes

• A disk that is genuinely full: years of uploads, images, videos, and backups pile up until the drive or account quota reaches 100 percent.
• Oversized backups and log files: nightly backups that are never cleaned up, plus error and access logs that grow without rotation, can quietly eat gigabytes.
• Unpruned databases and file versions: spam comments, post revisions, expired transients, and kept file versions all count against the same storage limit.
• A quota that no longer fits the site: a starter hosting plan with a small disk allowance is easily outgrown by a media-heavy site, even when nothing is wasted.
• Temporary files and caches left behind: failed uploads, staging copies, and cache folders that never expire can strand large amounts of space.

How to fix 507 Insufficient Storage — step by step

The whole fix takes about thirty minutes: find what is full, free the obvious waste, and put a limit in place that fits the site's real size.

1. Check your disk usage before deleting anything. Open your hosting control panel and look for Disk Usage or Files, then check how much space is used and how much is left. On a server you control, run df -h in a terminal and look at the Use% column for the disk that holds your site. If usage is at or near 100 percent, or your account quota shows full, you have found the cause. Do not guess at other fixes until you know which disk or quota is full.
2. Free space fast from backups, logs, and caches. In cPanel open Files, then File Manager, and sort your largest folders first. Delete old site backups you have already downloaded, expired error logs in the logs folder, and stale cache files you no longer need. Keep at least one recent backup downloaded to your own computer before you delete anything, so freeing space never becomes losing the site.
3. Trim oversized uploads and media files. Media uploads are the quiet space-eaters on most sites. In WordPress open Media, then Library, sort by the largest files, and remove unused videos, duplicate images, and full-resolution photos that were never published. Compress the images you keep and delete the originals from the uploads folder. On a file server, move archived files off the live disk to cheaper archive storage instead of letting them sit in the active folder.
4. Prune the database and old revisions. A database can grow until it eats the whole quota even when the files look small. Delete spam comments, expired transients, and old post revisions, then optimize the tables so the freed space is actually reclaimed. If you run a file-sync or WebDAV service, clear old file versions and deleted-item trash as well, because kept versions count against the same storage limit.
5. Raise the quota or move to a bigger disk. If the disk fills again during normal use, the limit itself is too small. Ask your host to raise your account quota, or move the site to a plan with more disk space. On your own server, add a larger volume and move the uploads or data directory onto it, then update the configuration to point at the new location. A bigger limit is the only permanent fix when real content growth is the cause.
6. Set up alerts so the disk never fills silently again. Turn on disk-usage alerts in your hosting panel or monitoring tool at 75 percent and again at 90 percent, so you get warned while there is still time to act. Schedule automatic cleanup of old logs and temporary files, and review disk usage once a month. A five-minute monthly check beats another surprise 507 in the middle of an upload.

Did this fix it? Quick checklist

• Disk usage was checked first, and you know which disk or quota was full and by how much
• Old backups, logs, and stale caches are deleted, with one recent backup safely downloaded first
• Oversized media, database bloat, and old file versions are pruned, and the freed space shows in disk usage
• The quota is raised or the data moved to a bigger disk if normal growth fills it, and usage alerts are on at 75 and 90 percent

One more spot to check if the 507 keeps returning right after you free space: look for a runaway process writing logs or temporary files continuously, such as a debug log left on in production or a backup job that copies the site into itself. A disk that refills within hours is not a storage problem anymore; it is a process writing endlessly, and stopping that process matters more than deleting files. And if only one user or folder hits the limit while the server still has room, check for a per-user or per-folder quota, which behaves exactly like a full disk for that account alone.