Update contact with a deal trigger

Update contact with a deal trigger

Hi everyone,

Here is my problem :

We close deals with 3 meetings : M0, M1, M2.

I want that :
- if my deal is in M1 stage, then create a new google drive folder and put the link of the field in the contact field.

With workflow rules or Zoho Flow, I am not able to get to the contact associated with the deal and put the link in a field.

Do you have any idea how to achieve that ?

Thanks a lot