# File exists (Step)

The File exists step verifies the existence of a file by checking filenames coming from previous steps, and adds a Boolean flag field to the input fields of the output.

![File exists dialog](/files/qjAW3O0dt31Vi6dhf4wm)

The following fields are available to this transformation step:

| Field                 | Description                                                                                                                          |
| --------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| **Step name**         | Specify the unique name of the File exists transformation step on the canvas. You can customize the name or leave it as the default. |
| **Filename field**    | Specify the input field that will contain the filename at runtime.                                                                   |
| **Result fieldname**  | Specify the name of the field that will contain the Boolean (Y/N) flag.                                                              |
| **Add filename to**   | Select to add the filename to the list of filenames that can be used in the next job entry.                                          |
| **Include file type** | Select to include the file type in the field.                                                                                        |
| **File type field**   | Specify the name of the field that contains the file type as a String (for example, `file`, `folder`, or `imaginary`).               |

**Note:** To view a sample transformation in the PDI client, open the `/design-tools/data-integration/samples/transformations/File exists – VFS example.ktr` sample file.


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