> ## Documentation Index
> Fetch the complete documentation index at: https://docs.custral.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Attachment-shaped property types. Files and images stored on a record.

## General properties

These hold uploaded content rather than a typed value. The record stores a
reference; the file itself lives in Custral's resource storage.

<CardGroup cols={2}>
  <Card title="File" icon="paperclip" href="/data/properties/general/file">
    Any uploaded document: contracts, specs, exports.
  </Card>

  <Card title="Image" icon="image" href="/data/properties/general/image">
    Pictures, with optional size hints and a built-in cropper.
  </Card>
</CardGroup>

<Note>
  Over the API both types read and write a **resource id**, not raw bytes, see
  [How the schema works](/dev/api-reference/schema).
</Note>


## Related topics

- [Overview](/data/properties/common/overview.md)