# Unknown files detected within the installation folder

**URL:** <https://help.nextcloud.com/t/unknown-files-detected-within-the-installation-folder/251224>\
**Category:** 📦 Appliances (Docker, Snappy, VM, NCP, AIO)\
**Tags:** docker, aio\
**Created:** [October 20, 2026, 10:17am UTC](https://help.nextcloud.com/t/unknown-files-detected-within-the-installation-folder/251224 "2026-10-20T10:17:35Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![svefro](https://help.nextcloud.com/user_avatar/help.nextcloud.com/svefro/32/80000_2.png) [@svefro](https://help.nextcloud.com/u/svefro)\
**Post date:** [October 20, 2026, 10:17am UTC](https://help.nextcloud.com/t/unknown-files-detected-within-the-installation-folder/251224/1 "2026-10-20T10:17:35Z")

</div>

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## The Basics

- Nextcloud Server version _(e.g., 29.x.x)_:
  - `35.0.0`

- Operating system and version _(e.g., Ubuntu 24.04)_:
  - `docker aio`

- Installation method _(e.g. AlO, NCP, Bare Metal/Archive, etc.)_
  - `aio`

### Summary of the issue you are facing:

when trying to update containers to latest version i get this error in the log

please assist. i do not know where the folder is

System config value updatedirectory set to string /nc-updater  
Config value were not updated  
System config value update\_channel set to string stable  
Nextcloud Updater - version: v34.0.0rc2-18-gb96f9cc  
Current version is 35.0.0.  
Update to Nextcloud 35.0.2 available. (channel: “stable”)  
Following file will be downloaded automatically: [https://github.com/nextcloud-releases/server/releases/download/v35.0.2/nextcloud-35.0.2.zip](https://github.com/nextcloud-releases/server/releases/download/v35.0.2/nextcloud-35.0.2.zip)  
Open changelog ↗  
Updater run in non-interactive mode.  
Start update  
Info: Pressing Ctrl-C will finish the currently running step and then stops the updater.  
 Check for expected files … K;41m[✘] Check for expected files failed;49m  
;41mUnknown files detected within the installation folder. This can be fixed by manually removing (or moving) these files. The following extra files have been found:;49m  
;41m core.8;49m  
;41m core.7;49m  
;41mUpdate failed. To resume or retry just execute the updater again.;49m  
SveCloud 35.0.0  
Nextcloud Updater - version: v34.0.0rc2-18-gb96f9cc  
Current version is 35.0.0.  
Update to Nextcloud 35.0.2 available. (channel: “stable”)  
Following file will be downloaded automatically: [https://github.com/nextcloud-releases/server/releases/download/v35.0.2/nextcloud-35.0.2.zip](https://github.com/nextcloud-releases/server/releases/download/v35.0.2/nextcloud-35.0.2.zip)  
Open changelog ↗  
Updater run in non-interactive mode.  
Start update  
Info: Pressing Ctrl-C will finish the currently running step and then stops the updater.  
 Check for expected files … K;41m[✘] Check for expected files failed;49m  
;41mUnknown files detected within the installation folder. This can be fixed by manually removing (or moving) these files. The following extra files have been found:;49m  
;41m core.8;49m  
;41m core.7;49m  
;41mUpdate failed. To resume or retry just execute the updater again.;49m  
SveCloud 35.0.0  
System config value updatechecker set to boolean true  
nextcloud-aio already enabled  
Done.  
Done.  
All tables already up to date!  
Automatically reloading the page after 10s.