API Approach/ File Based System

Hi Team,

We have a requirement to send the data to an external system from SAP.

Currently, in ECC we are sending the data using a file-based approach.

Now we are migrating to HANA and looking for an approach to use in S/4 HANA.

Which one should be better File base/ creating an API and sending data in JSON format.

Appreciate help here!

Thanks