To better understand which file is a better choice for you, here's how:
For Bank File (FAST), it will show the breakdown of all employees' salaries in the bank statement, which potentially could be a confidentiality issue. FAST essentially allows you to transfer funds between banks instantly. However, there is a charge for each transaction for FAST payment.
For Bank File (GIRO), this is usually a preferred option because it displays 1 transaction line only in the bank statement for the whole batch payment.
In addition, for Bank File (FAST), they are not SAL coded by default. Bank File (GIRO) is SAL coded. 😁