Need to know how to extract ACH/EFT data to a text file for upload to a bank portal

We are on World A9.3 and are starting to do EFT to Vendor bank accounts. Most of this is fairly straight forward, but when it comes time to get the data we need for the bank, it uses the terms Diskette and Bank Tape - both of which are outdated terminology. What we need to do is have the flat file get produced that we can send to the accountant where they log into the banks secure site and upload. Am at a loss how to do that. Would we simply put the directory of the IFS folder we want