> ## Documentation Index
> Fetch the complete documentation index at: https://flatfileinc-feat-updatereactquickstart.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Move from the legacy products to the new Flatfile Platform

<Warning>
  This area is for existing customers of Flatfile. If you're new, start
  [here](../apps/custom/tutorial-landing).
</Warning>

## Resources

Using a prior version of Flatfile? You've come to the right place. This is your entry point for upgrading to the new Platform. Find your version, then get started.

### Portal 3.0

<CardGroup cols={2}>
  <Card title="Upgrading from v3" href="/upgrade/v3_upgrade" icon="square-up">
    We've compiled a comprehensive guide that highlights both the distinctions
    and resemblances between Portal 3.0 and Platform.
  </Card>

  <Card title="Example Repo" href="https://github.com/FlatFilers/Upgrade-Portal/tree/main/Start-Portal-3/Contacts" icon="github">
    Explore a GitHub repository with code comparisons between Portal 3 and the
    Platform.
  </Card>
</CardGroup>

### Portal 2.0

<CardGroup cols={2}>
  <Card title="Upgrading from v2" href="/upgrade/v2_upgrade" icon="square-up">
    We've compiled a comprehensive guide that highlights both the distinctions
    and resemblances between Portal 2.0 and Platform.
  </Card>

  <Card title="Example Repo" href="https://github.com/FlatFilers/Upgrade-Portal/tree/main/Start-Portal-2" icon="github">
    Explore a GitHub repository with code comparisons between Portal 2 and the
    Platform.
  </Card>
</CardGroup>