How do you match the input data with the data base on the sd card? For example, input ID 000001 then it will match the data base on the sd card with ID000001 is Mike or input ID000002 = Cristin or ID000003 = jhon, my point is that when the input id is entered the name data in the database will be retrieved to appear.
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you need to define how you structure the data in your file on the SD card
if there is no variable field length then each record could be from a flat structure and parsing the database is just about extracting record after record and checking if it matches whatever you are looking for
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