Docker does not seem to recognize my daemon.json file

Question

As the C drive of my pc is rather small, I wanted to save images to my D drive. For this purpose, I created a daemon.json file at C:\ProgramData\Docker\config\daemon.json. Inside, I only put the following:

{
"data-root": "d:\\docker"
}

However, when building a new image, it does not seem to end up in the specified folder... Any ideas?

Edit: I had to create the config folder as well as the daemon.json file myself, though I believe this is intended.