hey, thanks for your feedbacks !
@Darren_Murphy, you are totally right, I double checked with an existing script I had and yes, I was incorrectly using “on edit” rather “on change” (updated the picture and text in blog)
@Krivo good pointing (pretty sure I already read it before …) I added a disclaimer and link to the page you mentioned and would update this community thread. For my usage, personal usage for my cooking recipies and maybe other, pretty sure google drive would scale 
again thanks for your quick feedbacks !