diff --git a/firmware/hw_layer/mmc_card_access.cpp b/firmware/hw_layer/mmc_card_access.cpp
index d78a1a2c9b..571671be48 100644
--- a/firmware/hw_layer/mmc_card_access.cpp
+++ b/firmware/hw_layer/mmc_card_access.cpp
@@ -14,15 +14,44 @@ static char *buffer[2048];
 
 
 void handleTsR(char *input) {
-	if (input[1] == 0 && input[2] == 7) {
+	const uint16_t* data16 = reinterpret_cast<uint16_t*>(input);
+
+	if (input[0] == 0 && input[1] == 1) {
 		scheduleMsg(&sharedLogger, "TS_SD: RTC read command");
 		memset(buffer, 0, 9);
-	}
 
+	} else if (input[0] == 0 && input[1] == 0x11) {
+		int length = data16[2];
+		scheduleMsg(&sharedLogger, "TS_SD: fetch buffer command, length=%d", length);
+
+
+		if (length == 16) {
+
+        } else {
+            // SD read directory command
+
+		}
+
+
+	} else if (input[0] == 0 && input[1] == 0x14) {
+		scheduleMsg(&sharedLogger, "TS_SD: fetch data command blockNumber=");
+
+	} else {
+		scheduleMsg(&sharedLogger, "TS_SD: unexpected r");
+	}
 }
 
 void handleTsW(char *input) {
+	const uint16_t* data16 = reinterpret_cast<uint16_t*>(input);
 
+    if (input[0] == 0 && input[1] == 0x11) {
+		int code = data16[2];
+		scheduleMsg(&sharedLogger, "TS_SD: w, code=%d", code);
+
+
+    } else {
+		scheduleMsg(&sharedLogger, "TS_SD: unexpected w");
+    }
 }