Is there an interactive folder shortcut in Windows?

Question

Windows

Given
Win7
Folder in My Documents
Folder in D:\
The program writes and reads files to the folder in the MD.
In the software itself, the path cannot be changed, it is iron.
Due to the large number of files, of course, the C:\ drive is completely filled.
Task
Organize writing and reading files in the D:\folder folder so that the folder path in My Documents is read as a mirror.
Naturally, if you simply put a label of the folder name 1in1 from D:\folder into the path, it does not work.
What to do?

Answer 1

Make a symbolic link .
So the console command is:

mklink /d "D:\folder" "C:\Users\user\Documents\Папка"

Answer 2

I will add one more way, if the program takes the path to "My Documents" from the registry and does not use the hard-wired path c:\users\user\documents\working_folder_of the program
"My Documents" can be moved to another disk, completely.
To do this, open the properties of the "my documents" folder and look for the "Location" tab.
There you can specify a new path where the system will move all current files from the MD and will use this path by default.
To solve the problem in the form in which you described it , the dollar method is more suitable. What I wrote is more of an alternative.