AdvStringDrid Load another File

How to load (add) new file (files) to AdvStringDrid if AdvStringDrid is not empty?

Thank for advice Frank

If you use CSV files, you can use InsertFromCSV()

Thanks for swift reply, but I need to add a file saved as SaveToFile not CSV file. 

Is anny way how to add it?

Thanks Frank

For SaveToFile() there is only LoadFromFile()
For this file format, it stores values per cell, column widths, row count, column count, so , this format is incompatible with wanting to load cells at a different position than their original position. 
If you need to combine data, either use a CSV format or temporary load data in another grid and then programmatically append data from one grid to the original grid.