[Question] How to write at the end of the file with FFileHelper::SaveStringToFile(SaveText, *path);

I am trying to write some data from game to a txt file with FFileHelper::SaveStringToFile(SaveText, *path).
But this function deletes all the existing data inside the file and then writes the new data. I want to keep old data and add the new data at the end of the file.

Is there any other function, or maybe a flag that allows such a option?