Normally, the system finds the drive with the most space on it, and sets the local cache.
To change it, you have to change a configuration file.
Do the following:
-Close the program.
-In File Explorer, in the path bar type %localappdata%
-In there, a hidden folder called RfUserData is located.
-In the folder, there is a file called ClientPcConfiguration.cfg.
-In this file there is some JSON. The app cache location is set by 3 different values. There are many other values in the configuration, but don't change any of them.
-Here is an example of the cache located on D:
-Set this to the drive of your preference, here the cache is moved from "d" to "e" by changing the "d:" with "e:"
-Then copy the RushFiles folder from the old location to the new.
-Start the program again.