Pause, resume, and retry uploads

Files over 256 MB are uploaded in parts. If a large upload is interrupted, quickS3 only needs to send the parts that are missing. Smaller files upload in one go, so if they’re interrupted they start again from the beginning.

The buttons on an upload

• Pause stops an upload for now. Select Retry to carry on. Large files continue where they stopped; small ones start over.
• Retry appears on paused and failed uploads. For large files, it sends only the missing parts.
• Cancel (✕ while uploading) stops the upload for good and throws away the parts already sent.
• Remove (✕ on a finished row) clears it from the list. The uploaded file stays in the bucket.

Resume after closing the tab

If you close the tab or your computer restarts during a large upload, you can pick it up again later from the same browser:

1. Go back to the same bucket and folder, and select Upload.
2. The panel lists Interrupted upload with the file name and how much was sent.
3. Select Select file to resume and pick the same file from your computer.

quickS3 checks that it’s the same file, then sends only what’s left. You have seven days to resume. After that, you’ll need to upload it again.

Resuming only works in the browser where you started, because that’s where quickS3 remembers the upload. It stores the upload’s progress there, not the file itself.

When an upload fails

quickS3 retries each part up to three times on its own before showing an error. If it still fails:

The error mentions	What to do
Write access, or “forbidden”	You don’t have Write access in this folder. Ask an Owner or Admin.
File size or “too large”	The file is over this connection’s limit. See upload limits.
CORS, or a network error on every file	The bucket isn’t set up for browser uploads. An Owner can fix CORS.
The upload reaches 100% but never completes	Also a CORS problem: the bucket needs to expose the ETag header.

If cancelling says cleanup is pending, quickS3 couldn’t reach your provider to remove the partial upload. It tries again later, so you don’t need to do anything.