# File transfer applications
source: https://developer.mastercard.com/carbon-calculator-china/documentation/file-based-scoring-protocols/index.md

This section describes the file transfer methods used by the Carbon Calculator file-based scoring methodology. These sections help you to understand their workflow and implement the solution within your application. This is file-based scoring and hence no API is involved in the carbon score calculation.

To know more about the file transfer applications that Carbon Calculator supports, select the links in this table:

|                                                                       File transfer application                                                                       |                             Description                              |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------|
| [NGFT - Next Gen File Transfer](https://developer.mastercard.com/carbon-calculator-china/documentation/file-based-scoring-protocols/ngft_file_based_scoring/index.md) | Describes how to upload and retrieve the scored CSV files from NGFT. |
| [GFT - Global File Transfer](https://developer.mastercard.com/carbon-calculator-china/documentation/file-based-scoring-protocols/gft_file_based_scoring/index.md)     | Describes how to upload and retrieve the scored CSV files from GFT.  |