diff --git a/sufst-controller/sd.h b/sufst-controller/sd.h
index bbe13efb31ebacbc533f8375a32ad113ea474782..3849013861301f6ab78a7833a2bc92b0ae7ad371 100644
--- a/sufst-controller/sd.h
+++ b/sufst-controller/sd.h
@@ -10,11 +10,11 @@
  * For multiple SPIs connected to the sd SPI #define USE_STANDARD_SPI_LIBRARY 1 must be in in SdFatConfig.h.
  */
 
-#define SD_CS_PIN 0
-#define SD_BUFFER_LEN 256
-#define SD_WRITE_LEN 64
+#define SD_CS_PIN 4
+#define SD_BUFFER_LEN 1024
+#define SD_WRITE_LEN 512
 #define SD_FILE_NAME "DATA.BIN"
-#define SD_WRITES_BEFORE_FLUSH 8
+#define SD_WRITES_BEFORE_FLUSH 2
 
 uint8_t sdBegin();