My C:/ driver is full and I cannot update my Oculus. I have a driver with 3TB but I cannot change the update path to the 3TB one. The driver is called E:/.
Not sure if the Oculus app can be moved, but it can be installed to that E: drive. https://support.oculus.com/1142129705828091/ The games directory certainly can be changed from within the Oculus app.