When saving files, Blender will save files to "My Documents" based on some hard coding. It will not save to other folders even if they have valid windows file/folder permissions. Further, it does not honor the redirection shortcuts as described below.
Blender should follow Windows file/folder permissions and not force it's own file rules of only using "My Documents".
Why it breaks for me:
In windows, it is possible to MOVE your "My Documents", "My Music", and other folders. You can "change location" for these standard folders. In my case, I use OneDrive. I have moved "My Documents" into my "OneDrive\My Documents" folder. This enables my documents to sync from one computer to another automatically.
Blender is only willing to save to C:\users\jerry\my documents. It will not honor my personalized location of "c:\users\jerry\onedrive\my documents".
My folders do have correct permissions for Windows apps and works perfectly for other applications. But since blender implements it's own internal restrictions on where it is willing to write files, that is causing a problem.
Others who encounter this problem are simply running blender as administrator. They never figure out that the reason they must do that is because blender is not honoring windows conventions for files and folders.
There are two parts to this bug:
- You should honor shortcuts and relocated "my documents" folders, etc. Windows allows things to move. Blender should respect that.
- Blender denies writing to folders where writing is allowed by windows because it forces usage of default "my documents" locations on the C: drive. All other folders are denied. Blender should honor the permissions systems implemented in Windows and not override them.