MKS Gen L v1.0 cannot write SD card (no replies)

Hello World!
I have a problem: I can't configure correctly my SD module (a simple SD module without screen, by Fysetc).
I'm able to read files, but when I try to write (using usb or wifi, with Cura or Repetier Host, it's the same), I receive an error
echo:Now fresh file:
open failed, File: .

MY sd is connects with AUX3, but I think it's an error in PIN config... it's can cause no-writing sd card?
MKS GEN L V1.0 use this pin scheme for AUX3
AUX3 : GND D52 D50 5V
NC D53 D51 D49

so I added to pin_Ramps.h (PIN_MKS_GEN_L.h include pin_Ramps.h) this:

#define AUX3_03_PIN 53
#define AUX3_04_PIN 52
#define AUX3_05_PIN 51
#define AUX3_06_PIN 50
#define AUX3_07_PIN 49

Usually SD module is connect with EXP2 in Ramps, so I have to set SD card module for AUX3....where can I configure this?
Thanks and excuse me for my poor English!
P.S. My printer use A4988 drivers and a Fysetc 4.3 serial screen. This is my Configure.h, Configure.adv.h and pin_Ramps.h files