I would see if fat16lib or someone else has more to add to this thread. It may or may not be that problem. It might help other users if you posted the make, model, and size of the SD card you have in the module, and anything you have done to it, like reformatting. Most of that can be corrected.
If it is the new rc component of that circuit, you will probably need to get another type of SD module. To insure the best performance, get one with a logic level converter, not the voltage divider.