---
title: "Folder sensor"
description: "Sensor for monitoring the contents of a folder."
logo: file.png
ha_category:
  - Utility
ha_iot_class: Local Polling
ha_release: 0.64
redirect_from:
 - /components/sensor.folder/
---

Sensor for monitoring the contents of a folder. Note that folder paths must be added to [whitelist_external_dirs](/docs/configuration/basic/). Optionally a [wildcard filter](https://docs.python.org/3.6/library/fnmatch.html) can be applied to the files considered within the folder. The state of the sensor is the size in MB of files within the folder that meet the filter criteria. The number of filtered files in the folder and total size in bytes of those files are exposed as attributes.

## Configuration

To enable the `folder` sensor in your installation, add the following to your `configuration.yaml` file:

```yaml
sensor:
  - platform: folder
    folder: /config
```

{% configuration %}
folder:
  description: The folder path
  required: true
  type: string
filter:
  description: Filter to apply
  required: false
  default: "`*`"
  type: string
{% endconfiguration %}