SD searching and editing record, is it possible?

Hi,
If I have data on my card, i.e time/date, temperature value and maybe a 0 or 1 value for certain records, can I search through each record and look for the 0 or 1 value and possible change a 0 to 1 and a 1 to 0?
the data on the SD card is in CSV format.
thanks guys

can I search through each record and look for the 0 or 1 value and possible change a 0 to 1 and a 1 to 0?

Yes. Permission is granted for you to do that.