> For the complete documentation index, see [llms.txt](https://docs.learnersblock.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.learnersblock.org/how-to-use-it/advanced-features/pruning-system-files.md).
# Pruning System Files
Some files accumulated over time are kept on the device for speed and offline access. These include:
* Docker images of downloaded applications from the [Application Store](/how-to-use-it/installing-from-the-application-store.md)
These files are kept for speed and convenience when using your device. If, however, you need to free up space on your SD card you can prune these files without any major impacts to your device.
{% hint style="info" %}
Here is an example. When you install applications from the [Application Store](/how-to-use-it/installing-from-the-application-store.md) and then [remove them](/how-to-use-it/installing-from-the-application-store.md#removing-an-application) again, the application's system files are kept on the device for your easy offline installation later. If, however, you would rather have the space back, you can prune these files using the Prune button.
**Note,** however, that this will not remove your application data and settings that are used by the application manufacturer to customise the app to you. Therefore, if you reinstall the application later, your settings will be restored. If you want to remove these files, do so through the applications own interface.
{% endhint %}
In order to prune system files, click the settings icon in the top right of the interface
. Click the 'Advanced' tab.
Scroll to the bottom and you will find a `Prune` button under the 'System Maintenance' heading:
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.learnersblock.org/how-to-use-it/advanced-features/pruning-system-files.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.