Saving object location in excel sheet

In a thread below (about placing markups and about falling through the terrain) I have resolved those two issues. (YAY!)

I can now place a flag (markup point) using the Y button on the left controller. This places a markup 2 feet from the user. But the problem is, that i want to save the location of each object (markup/flag) that I place, and the coordinates of each flag needs to be stores in an excel file/CSV file.

How can I do that? I was thinking about a for-each loop maybe? (e.g Input.GetKeyDown(KeyCode JoystickButton3) and every time I press that button it saves the object location i excel? Or is there a better/easier way to store the location data?

In the picture is the flag that I place (The flags dissapear thoug, when I exit VR mode??)


This is the code I have made to spawn the markups/flags.