Unfortunately, no, there's no option to move the folder, so no way to reduce the Documents folder clutter. There is a work around for disk space usage, however.
I, too, have separate/partitioned drives for the OS, games, what-have-you and so have moved the save game folder and the config/settings/screenshots/export folder into my Warband game directory on the other drive.
I've then created a junction between fake folders within Documents and the real data in the Warband game directory using the following Windows command:
插入代码块:
mklink /j source-path target-path
To Warband, the data is still in Documents\Mount&Blade Warband\, but the actual disk space is in my Warband game directory.