sorry for my poor English. Is there a way to use the "TextFinder lib" to read a txt.file from the sd card.

mfg santje243

Do you have a URL from this lib? I don't know it...

Finding text on an SD card will take very much time for an Arduino as its clockfrequency is roughly 100 times (s)lower than a PC/Mac and even on a PC it takes a serious amount of time but I don't know how much time you have or how much text is on the SD card....