diff --git a/firmware/hw_layer/backup_ram.cpp b/firmware/hw_layer/ports/stm32/backup_ram.cpp
similarity index 93%
rename from firmware/hw_layer/backup_ram.cpp
rename to firmware/hw_layer/ports/stm32/backup_ram.cpp
index 717dca1bb0..ac333fd3e9 100644
--- a/firmware/hw_layer/backup_ram.cpp
+++ b/firmware/hw_layer/ports/stm32/backup_ram.cpp
@@ -54,3 +54,7 @@ void backupRamSave(backup_ram_e idx, uint32_t value) {
 	}
 #endif /* HAL_USE_RTC */
 }
+
+void backupRamFlush(void) {
+	// nothing to do here, in STM32 all data is saved instantaneously
+}
diff --git a/firmware/hw_layer/serial_over_usb/usbcfg.c b/firmware/hw_layer/ports/stm32/serial_over_usb/usbcfg.c
similarity index 100%
rename from firmware/hw_layer/serial_over_usb/usbcfg.c
rename to firmware/hw_layer/ports/stm32/serial_over_usb/usbcfg.c
diff --git a/firmware/hw_layer/serial_over_usb/usbcfg.h b/firmware/hw_layer/ports/stm32/serial_over_usb/usbcfg.h
similarity index 100%
rename from firmware/hw_layer/serial_over_usb/usbcfg.h
rename to firmware/hw_layer/ports/stm32/serial_over_usb/usbcfg.h
diff --git a/firmware/hw_layer/serial_over_usb/usbconsole.c b/firmware/hw_layer/ports/stm32/serial_over_usb/usbconsole.c
similarity index 100%
rename from firmware/hw_layer/serial_over_usb/usbconsole.c
rename to firmware/hw_layer/ports/stm32/serial_over_usb/usbconsole.c
diff --git a/firmware/hw_layer/serial_over_usb/usbconsole.h b/firmware/hw_layer/ports/stm32/serial_over_usb/usbconsole.h
similarity index 100%
rename from firmware/hw_layer/serial_over_usb/usbconsole.h
rename to firmware/hw_layer/ports/stm32/serial_over_usb/usbconsole.h
diff --git a/firmware/hw_layer/ports/stm32/stm32f4/hw_ports.mk b/firmware/hw_layer/ports/stm32/stm32f4/hw_ports.mk
index 7294832f51..cf2e2c7654 100644
--- a/firmware/hw_layer/ports/stm32/stm32f4/hw_ports.mk
+++ b/firmware/hw_layer/ports/stm32/stm32f4/hw_ports.mk
@@ -1,11 +1,18 @@
 HW_LAYER_EMS += $(PROJECT_DIR)/hw_layer/ports/stm32/flash_int.c \
+				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f4/stm32f4xx_hal_flash.c \
+				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f4/stm32f4xx_hal_flash_ex.c \
+                $(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb/usbcfg.c \
+	            $(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb/usbconsole.c
+
+HW_LAYER_EMS += $(PROJECT_DIR)/hw_layer/ports/stm32/flash.c \
 				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f4/stm32f4xx_hal_flash.c \
 				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f4/stm32f4xx_hal_flash_ex.c
 
 HW_LAYER_EMS_CPP += $(PROJECT_DIR)/hw_layer/ports/stm32/stm32f4/mpu_util.cpp \
 	$(PROJECT_DIR)/hw_layer/ports/stm32/stm32_pins.cpp \
-	$(PROJECT_DIR)/hw_layer/ports/stm32/stm32_common.cpp
-	
+	$(PROJECT_DIR)/hw_layer/ports/stm32/stm32_common.cpp \
+	$(PROJECT_DIR)/hw_layer/ports/stm32/backup_ram.cpp
+
 RUSEFIASM = $(PROJECT_DIR)/hw_layer/ports/stm32/rusEfiStartup.S
 
-HW_INC += $(PROJECT_DIR)/hw_layer/ports/stm32
+HW_INC += $(PROJECT_DIR)/hw_layer/ports/stm32 $(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb
diff --git a/firmware/hw_layer/ports/stm32/stm32f7/hw_ports.mk b/firmware/hw_layer/ports/stm32/stm32f7/hw_ports.mk
index 93ffca3e4a..f2eddc3847 100644
--- a/firmware/hw_layer/ports/stm32/stm32f7/hw_ports.mk
+++ b/firmware/hw_layer/ports/stm32/stm32f7/hw_ports.mk
@@ -1,12 +1,19 @@
-HW_LAYER_EMS += $(PROJECT_DIR)/hw_layer/ports/stm32/flash_int.c \
+HW_LAYER_EGT = $(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb/usbcfg.c \
+	            $(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb/usbconsole.c \
+                $(PROJECT_DIR)/hw_layer/ports/stm32/flash_int.c \
+				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f7/stm32f7xx_hal_flash.c \
+				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f7/stm32f7xx_hal_flash_ex.c
+
+HW_LAYER_EMS += $(PROJECT_DIR)/hw_layer/ports/stm32/flash.c \
 				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f7/stm32f7xx_hal_flash.c \
 				$(PROJECT_DIR)/hw_layer/ports/stm32/stm32f7/stm32f7xx_hal_flash_ex.c
 
 HW_LAYER_EMS_CPP += $(PROJECT_DIR)/hw_layer/ports/stm32/stm32f7/mpu_util.cpp \
 	$(PROJECT_DIR)/hw_layer/ports/stm32/stm32_pins.cpp \
-	$(PROJECT_DIR)/hw_layer/ports/stm32/stm32_common.cpp
-	
+	$(PROJECT_DIR)/hw_layer/ports/stm32/stm32_common.cpp \
+	$(PROJECT_DIR)/hw_layer/ports/stm32/backup_ram.cpp
+
 RUSEFIASM = $(PROJECT_DIR)/hw_layer/ports/stm32/rusEfiStartup.S
 
-HW_INC += $(PROJECT_DIR)/hw_layer/ports/stm32
+HW_INC += $(PROJECT_DIR)/hw_layer/ports/stm32 $(PROJECT_DIR)/hw_layer/ports/stm32/serial_over_usb
 	
\ No newline at end of file