Windows 11, 10, 8, 7, and Vista all support symbolic links — also known as symlinks — that point to a file or folder on your system. You can create them using the Command Prompt or a third-party tool called Link Shell Extension.
My computer, right click documents, select properties, location tab, then select where you want tthem to be saved, problem with that is it is all your document files not just ACC replays.
Or same diff route, C: \users\your user name\ and again right click docs\properties then location tab and edit to your desired location.
NB: I did this so that it's saving them on my SSD btw, to reduce the likelihood of any glitches during races. I will eventually rebuild my PC with an SSD as the boot drive, but for now it's a HDD...