# SMB destination fails with existing Duplicati repository containing ~20,000 files ("Not enough credits")
**URL:** https://forum.duplicati.com/t/smb-destination-fails-with-existing-duplicati-repository-containing-20-000-files-not-enough-credits/22594
**Category:** Support
**Created:** [August 2, 2026, 7:42pm UTC](https://forum.duplicati.com/t/smb-destination-fails-with-existing-duplicati-repository-containing-20-000-files-not-enough-credits/22594 "2026-08-02T19:42:29Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@User2019](https://forum.duplicati.com/u/User2019)
#### Post date: [August 2, 2026, 7:42pm UTC](https://forum.duplicati.com/t/smb-destination-fails-with-existing-duplicati-repository-containing-20-000-files-not-enough-credits/22594/1 "2026-08-02T19:42:30Z")
I’m running Duplicati 2.2.0.3\_stable\_2026-01-06. I have several backups tasks that were imported and were running successfully from version **2.1.0.5** using the **File** destination type.
With some help writing this post with ChatGPT, here is the story.
Today, I modified one of my backup sources and saved the task. After that change, the backup was no longer working. I discovered that the destination path previously configured under the **File** destination was no longer available, and no matter how I tried to re-enter the path, Duplicati could not reconnect to the NAS share.
While troubleshooting, I found that Duplicati now has a dedicated **SMB** destination type. I configured it and initially it appeared to work for a simple task. So, I started migrating my other backup tasks (about 10 jobs) from **File** to **SMB** , but I encountered a problem.
For existing backup folders (and already working task), using the SMB destination the connection test fails with:
> Error listing content: Not enough credits
I tried different configurations:
- hostname vs IP address
- different path formats
- verifying permissions
- testing with new folders
During testing, I discovered an important detail:
- Existing Duplicati repository folder (~20,000 files) → **fails**
- Newly created empty folder under the same share → **works**
The repository contains normal Duplicati backup files:
- `.dblock.zip.aes`
- `.dindex.zip`
- `.dlist.zip`
The total repository size is approximately **944 GB** , with a dblock size of **100 MB**.
This leads me to believe that the issue is related to directory enumeration in the SMB destination backend. It appears that the SMB backend cannot properly list a directory containing a large number of files, while the previous File destination worked correctly.
My questions:
1. Is the SMB destination currently known to have issues with large directories?
2. Is there an SMB parameter, timeout, or credit limit that can be adjusted?
I’m a little bit nervous now because, I have no way to add new folders to any of my tasks because as soon as I save them, they become broken…
Thanks in advance for your help!
--
David
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### Author:  [@User2019](https://forum.duplicati.com/u/User2019)
#### Post date: [August 2, 2026, 8:37pm UTC](https://forum.duplicati.com/t/smb-destination-fails-with-existing-duplicati-repository-containing-20-000-files-not-enough-credits/22594/2 "2026-08-02T20:37:20Z")
Well, by reversing to the old UI I was able to reconfigure and reconnect everything correclty. My issue is gone.
But there is still two issues I think:
1. The new interface is broken (unable to insert network path manually for the File destination
2. The SMB destination seems to also be broken were there is more than a specific amount of file in the folder (\>20k?)
Thank you!