Zend certified PHP/Magento developer

Wha can’t I move my Documents folder?

I’m running out of space on my C drive, so I started moving my data folders to my hdd. To do this, I opened file explorer, right clicked the folder (e.g. “My Videos”) and changed the directory path under the “location” tab.
This worked fine for all folders that weren’t affected by OneDrive.

The affected folders are stored under “C:users <my_name> OneDriveDocuments” and I would like them to go to “X:Documents” or something like that.

The main Issue is my Documents folder. I want to make sure that any software trying to find stuff that was put there can still find it after I move the directory. When trying to move the directory in the way described above, I get an error message: (It’s in german, but it says something like this:)
“The Folder cannot be moved, because there is a non redirectible folder in the same location. Access denied.”

The funny thing is, OneDrive was apparently inactive on my machine. When trying to undo the OneDrive snchronization I signed back in to one drive, which still remembered my mail address etc.
Then I unlinked my account following these instructions.
This did not in fact move my documents folder out of this evil OneDrive folder, effectively leaving me right where I started.

I then tried to log back in to OneDrive from fresh. Obviously It wanted to download my files from the cloud, and asked me where to put the OneDrive folder. I told it to use the existing OneDrive folder.
Apparently it tried to download all my files on top of the local copies, telling me that there was not enough space on my disk.

I did some digging and I found the relevant registry keys to force windows to do as I say, but I’m afraid of unwanted consequences. (Blindly messing with the registy has forsaken me on other matters before)

So here’s my question:
How do I move my Documents Folder?

PS:
I’m using windows 10.
If any other info is needed I’m happy to share.