diff --git a/README.md b/README.md
index 3ad4a0a..16f6880 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ as .py file does, except not going to pop up a black terminal when running direc
 - Should call `writerandomvalues.py` to simulate Arduino data when nothing is connected but user still want to run. Currently just pop up error
 - "plot" button is completely disabled, should be enabled whenever is not plotting but is reading data
 - Matplotlib cannot really run in multithread, this might going to be an issue for packing the program into an executable
+- Csv file is only created after you close the UI
 
 ## Todos & [Specs](https://docs.google.com/document/d/1Km2HZel7rILOvgHG5iXlUcXFx4Of1ot2I7Dbnq8aTwY/edit?usp=sharing):
 - [ ] Fix Issues