# Backup to QNAP S3
**URL:** https://forum.duplicati.com/t/backup-to-qnap-s3/22787
**Category:** Support
**Created:** [October 12, 2026, 7:20am UTC](https://forum.duplicati.com/t/backup-to-qnap-s3/22787 "2026-10-12T07:20:48Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@dup4teepee](https://forum.duplicati.com/u/dup4teepee)
#### Post date: [October 12, 2026, 7:20am UTC](https://forum.duplicati.com/t/backup-to-qnap-s3/22787/1 "2026-10-12T07:20:49Z")
I have set up an Amazon S3 service on a local QNAP server running QuObjects.
Adding the bucket name results in a error “Invalid Bucket” no matter what I add to that field. Although I had an error this did not seem to cause a failure.
What do I add to the Server Name field? The service endpoint? In my case that would be a [https://localIP](https://localIP):portnumber but I’m not sure that’s correct? I guess it is as I managed to get this to work without SSL (see below).
Doing so results in an error “Error listing content: The SSL connection could not be established, see inner exception”. If I change to ssl=false I get an error “Error listing content: The response ended prematurely. (ResponseEnded)” I changed the Server Settings in QuObjects to HTTP with ssl=false and the test completed successfully.
Any ideas on the HTTPS SSL issue?
Perhaps the Bucket error is a tiny bug?
Thank you
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### Author:  [@dup4teepee](https://forum.duplicati.com/u/dup4teepee)
#### Post date: [October 12, 2026, 7:45am UTC](https://forum.duplicati.com/t/backup-to-qnap-s3/22787/2 "2026-10-12T07:45:45Z")
My error here. It was a local certificate issue