This article will explain how to change the CSV extension file that we use to import into files with json extensions. because now to import your order data you need to use a file with json extension.
1. Enter the tools menu 0 then click on the more menu button - and select convert CSV to JSON as shown below
2. Then click choose file to upload your csv file that you want to change to json format. then click upload then you will succeed in getting the file you uploaded into a file with the .json extension