diff --git a/src/main.c b/src/main.c
index ac2c049..56f0299 100644
--- a/src/main.c
+++ b/src/main.c
@@ -61,7 +61,7 @@
 
 #include "tusb.h"
 #include "usb/tusb_descriptors.h"
-#include "usb/msc_flash.h"
+#include "usb/msc_uf2.h"
 
 
 #define BOOTLOADER_VERSION_REGISTER         NRF_TIMER2->CC[0]
diff --git a/src/make_common.mk b/src/make_common.mk
index adcfaf0..1550401 100644
--- a/src/make_common.mk
+++ b/src/make_common.mk
@@ -83,7 +83,7 @@ remduplicates = $(strip $(if $1,$(firstword $1) $(call remduplicates,$(filter-ou
 C_SOURCE_FILES += $(SRC_PATH)/main.c
 C_SOURCE_FILES += $(SRC_PATH)/dfu_ble_svc.c
 C_SOURCE_FILES += $(SRC_PATH)/usb/tusb_descriptors.c
-C_SOURCE_FILES += $(SRC_PATH)/usb/msc_flash.c
+C_SOURCE_FILES += $(SRC_PATH)/usb/msc_uf2.c
 
 # SDK 11 files
 C_SOURCE_FILES += $(SDK11_PATH)/libraries/bootloader_dfu/bootloader.c
diff --git a/src/segger/nrf52840_bootloader.emProject b/src/segger/nrf52840_bootloader.emProject
index be4046e..8faa9a0 100644
--- a/src/segger/nrf52840_bootloader.emProject
+++ b/src/segger/nrf52840_bootloader.emProject
@@ -58,8 +58,6 @@
       <file file_name="../pstorage_platform.h" />
       <file file_name="../sdk_config.h" />
       <folder Name="usb">
-        <file file_name="../usb/msc_flash.c" />
-        <file file_name="../usb/msc_flash.h" />
         <file file_name="../usb/tusb_config.h" />
         <file file_name="../usb/tusb_descriptors.c" />
         <file file_name="../usb/tusb_descriptors.h" />
@@ -67,6 +65,8 @@
           <file file_name="../usb/uf2/uf2cfg.h" />
           <file file_name="../usb/uf2/uf2.h" />
         </folder>
+        <file file_name="../usb/msc_uf2.c" />
+        <file file_name="../usb/msc_uf2.h" />
       </folder>
     </folder>
     <configuration
diff --git a/src/usb/msc_flash.c b/src/usb/msc_uf2.c
similarity index 99%
rename from src/usb/msc_flash.c
rename to src/usb/msc_uf2.c
index f3c8654..9ffde6f 100644
--- a/src/usb/msc_flash.c
+++ b/src/usb/msc_uf2.c
@@ -1,6 +1,6 @@
 /**************************************************************************/
 /*!
-    @file     msc_flash.c
+    @file     msc_uf2.c
     @author   hathach (tinyusb.org)
 
     @section LICENSE
@@ -34,7 +34,7 @@
 */
 /**************************************************************************/
 
-#include "msc_flash.h"
+#include "msc_uf2.h"
 
 #if CFG_TUD_MSC
 
@@ -468,8 +468,8 @@ fat12_boot_sector_t const _boot_sect =
 
 static inline bool fat12_formatted(void)
 {
-  const uint8_t* boot_sect = (uint8_t* ) lba2addr(0);
   return false;
+//  const uint8_t* boot_sect = (uint8_t* ) lba2addr(0);
   //return (boot_sect[510] == 0x55) && (boot_sect[511] == 0xAA);
 }
 
@@ -497,7 +497,7 @@ const char indexFile[] = //
     "</body>"
     "</html>\n";
 
-uint8_t const readme_contents[] = "Adafruit Feather nRF52840";
+const char readme_contents[] = "Adafruit Feather nRF52840";
 
 struct TextFile {
     const char name[11];
diff --git a/src/usb/msc_flash.h b/src/usb/msc_uf2.h
similarity index 99%
rename from src/usb/msc_flash.h
rename to src/usb/msc_uf2.h
index 3cff7ec..07b764d 100644
--- a/src/usb/msc_flash.h
+++ b/src/usb/msc_uf2.h
@@ -1,6 +1,6 @@
 /**************************************************************************/
 /*!
-    @file     msc_flash.h
+    @file     msc_uf2.h
     @author   hathach (tinyusb.org)
 
     @section LICENSE