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# Support for additional well-known files and CMS field types

> Discover the latest enhancements to Webflow's APIs, including updates to the Data API and beta endpoints.

## Add and manage well-known files

[Upload well-known files to sites](/data/v2.0.0-beta/reference/enterprise/site-configuration/well-known-files/put) with the following requirements:

* File size must be less than 100KB per file
* Maximum of 30 files total
* Files must have one of these extensions (or no extension):
  * `.txt`
  * `.json`
  * `.noext` - A special extension that removes other extensions when uploaded. This helps compatibility with tools that require file extensions \

    **Example:** `apple-app-site-association.noext.txt` will be uploaded as `apple-app-site-association`

## New CMS field type: Option

* **[Create Option fields](/data/v2.0.0-beta/reference/cms/collection-fields/create)**\

  Option fields let you define a predefined list of choices for a collection item. You can add these fields either when creating a new collection via the [create collection](/data/v2.0.0-beta/reference/cms/collections/create) endpoint or add them to existing collections using the [create collection field](/data/v2.0.0-beta/reference/cms/collection-fields/create) endpoint.