diff --git a/Marlin/src/MarlinCore.cpp b/Marlin/src/MarlinCore.cpp
index 05355ddccb..de6677fc9a 100644
--- a/Marlin/src/MarlinCore.cpp
+++ b/Marlin/src/MarlinCore.cpp
@@ -820,9 +820,6 @@ void idle(const bool no_stepper_sleep/*=false*/) {
   // Handle SD Card insert / remove
   TERN_(HAS_MEDIA, card.manage_media());
 
-  // Handle USB Flash Drive insert / remove
-  TERN_(HAS_USB_FLASH_DRIVE, card.diskIODriver()->idle());
-
   // Announce Host Keepalive state (if any)
   TERN_(HOST_KEEPALIVE_FEATURE, gcode.host_keepalive());
 
diff --git a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/cocoa_press/status_screen.cpp b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/cocoa_press/status_screen.cpp
index 1a7ccd8be5..65ac4551b9 100644
--- a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/cocoa_press/status_screen.cpp
+++ b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/cocoa_press/status_screen.cpp
@@ -432,8 +432,10 @@ void StatusScreen::onIdle() {
 }
 
 void StatusScreen::onMediaMounted() {
-  if (AT_SCREEN(StatusScreen))
-    setStatusMessage(GET_TEXT_F(MSG_MEDIA_INSERTED));
+  if (!AT_SCREEN(StatusScreen)) return;
+  setStatusMessage(ExtUI::isMediaMountedSD()  ? GET_TEXT_F(MSG_MEDIA_INSERTED_SD) :
+                   ExtUI::isMediaMountedUSB() ? GET_TEXT_F(MSG_MEDIA_INSERTED_USB) :
+                                                GET_TEXT_F(MSG_MEDIA_INSERTED));
 }
 
 void StatusScreen::onMediaRemoved() {
diff --git a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/status_screen.cpp b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/status_screen.cpp
index 420758ca88..7b9e8f9f34 100644
--- a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/status_screen.cpp
+++ b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/status_screen.cpp
@@ -588,8 +588,10 @@ bool StatusScreen::onTouchEnd(uint8_t tag) {
 }
 
 void StatusScreen::onMediaMounted() {
-  if (AT_SCREEN(StatusScreen))
-    setStatusMessage(GET_TEXT_F(MSG_MEDIA_INSERTED));
+  if (!AT_SCREEN(StatusScreen)) return;
+  setStatusMessage(ExtUI::isMediaMountedSD()  ? GET_TEXT_F(MSG_MEDIA_INSERTED_SD) :
+                   ExtUI::isMediaMountedUSB() ? GET_TEXT_F(MSG_MEDIA_INSERTED_USB) :
+                                                GET_TEXT_F(MSG_MEDIA_INSERTED));
 }
 
 void StatusScreen::onMediaRemoved() {
diff --git a/Marlin/src/lcd/extui/ui_api.cpp b/Marlin/src/lcd/extui/ui_api.cpp
index 7763bac05a..b3f4c39c24 100644
--- a/Marlin/src/lcd/extui/ui_api.cpp
+++ b/Marlin/src/lcd/extui/ui_api.cpp
@@ -1079,7 +1079,9 @@ namespace ExtUI {
     return isPrintingFromMedia() || printJobOngoing();
   }
 
-  bool isMediaMounted() { return TERN0(HAS_MEDIA, card.isMounted()); }
+  bool isMediaMounted()    { return card.isMounted(); }
+  bool isMediaMountedSD()  { return card.isSDCardMounted(); }
+  bool isMediaMountedUSB() { return card.isFlashDriveMounted(); }
 
   // Pause/Resume/Stop are implemented in MarlinUI
   void pausePrint()  { ui.pause_print(); }
diff --git a/Marlin/src/lcd/extui/ui_api.h b/Marlin/src/lcd/extui/ui_api.h
index 5e781706bc..7796a4e49f 100644
--- a/Marlin/src/lcd/extui/ui_api.h
+++ b/Marlin/src/lcd/extui/ui_api.h
@@ -464,6 +464,9 @@ namespace ExtUI {
    * Use these to operate on files
    */
   bool isMediaMounted();
+  bool isMediaMountedSD();
+  bool isMediaMountedUSB();
+
   bool isPrintingFromMediaPaused();
   bool isPrintingFromMedia();
   bool isPrinting();
diff --git a/Marlin/src/lcd/language/language_en.h b/Marlin/src/lcd/language/language_en.h
index d23e638a78..7ea17d5bb3 100644
--- a/Marlin/src/lcd/language/language_en.h
+++ b/Marlin/src/lcd/language/language_en.h
@@ -44,7 +44,7 @@
 
 #if HAS_SDCARD && !HAS_USB_FLASH_DRIVE
   #define MEDIA_TYPE_EN "SD Card"
-#elif HAS_USB_FLASH_DRIVE
+#elif HAS_USB_FLASH_DRIVE && !HAS_SDCARD
   #define MEDIA_TYPE_EN "USB Drive"
 #else
   #define MEDIA_TYPE_EN "Media"
diff --git a/Marlin/src/lcd/language/language_es.h b/Marlin/src/lcd/language/language_es.h
index d1e4babf2b..a92efd5389 100644
--- a/Marlin/src/lcd/language/language_es.h
+++ b/Marlin/src/lcd/language/language_es.h
@@ -30,7 +30,7 @@
 
 #if HAS_SDCARD && !HAS_USB_FLASH_DRIVE
   #define MEDIA_TYPE_ES "SD"
-#elif HAS_USB_FLASH_DRIVE
+#elif HAS_USB_FLASH_DRIVE && !HAS_SDCARD
   #define MEDIA_TYPE_ES "USB"
 #else
   #define MEDIA_TYPE_ES "SD/FD"
diff --git a/Marlin/src/lcd/language/language_gl.h b/Marlin/src/lcd/language/language_gl.h
index 6dd699f1bd..3b7620de90 100644
--- a/Marlin/src/lcd/language/language_gl.h
+++ b/Marlin/src/lcd/language/language_gl.h
@@ -32,7 +32,7 @@
 
 #if HAS_SDCARD && !HAS_USB_FLASH_DRIVE
   #define MEDIA_TYPE_GL "SD"
-#elif HAS_USB_FLASH_DRIVE
+#elif HAS_USB_FLASH_DRIVE && !HAS_SDCARD
   #define MEDIA_TYPE_GL "FD"
 #else
   #define MEDIA_TYPE_GL "SD/FD"
diff --git a/Marlin/src/lcd/language/language_it.h b/Marlin/src/lcd/language/language_it.h
index 424bcd8367..4bcde87859 100644
--- a/Marlin/src/lcd/language/language_it.h
+++ b/Marlin/src/lcd/language/language_it.h
@@ -40,7 +40,7 @@
 
 #if HAS_SDCARD && !HAS_USB_FLASH_DRIVE
   #define MEDIA_TYPE_IT "SD"
-#elif HAS_USB_FLASH_DRIVE
+#elif HAS_USB_FLASH_DRIVE && !HAS_SDCARD
   #define MEDIA_TYPE_IT "USB"
 #else
   #define MEDIA_TYPE_IT "Media"
diff --git a/Marlin/src/lcd/marlinui.cpp b/Marlin/src/lcd/marlinui.cpp
index 8b7e64dda8..f6b1b60c7d 100644
--- a/Marlin/src/lcd/marlinui.cpp
+++ b/Marlin/src/lcd/marlinui.cpp
@@ -1907,7 +1907,12 @@ uint8_t expand_u8str_P(char * const outstr, PGM_P const ptpl, const int8_t ind,
           quick_feedback();
           goto_screen(MEDIA_MENU_GATEWAY);
         #else
-          LCD_MESSAGE(MSG_MEDIA_INSERTED);
+          if (card.isSDCardSelected())
+            LCD_MESSAGE(MSG_MEDIA_INSERTED_SD);
+          else if (card.isFlashDriveSelected())
+            LCD_MESSAGE(MSG_MEDIA_INSERTED_USB);
+          else
+            LCD_MESSAGE(MSG_MEDIA_INSERTED);
         #endif
       }
       else {                // Media Removed
diff --git a/Marlin/src/sd/cardreader.cpp b/Marlin/src/sd/cardreader.cpp
index 9b0a37913a..21bc6e780a 100644
--- a/Marlin/src/sd/cardreader.cpp
+++ b/Marlin/src/sd/cardreader.cpp
@@ -501,7 +501,14 @@ void CardReader::mount() {
     cdroot();
   else {
     #if ANY(HAS_SD_DETECT, HAS_USB_FLASH_DRIVE)
-      if (marlin_state != MarlinState::MF_INITIALIZING) LCD_ALERTMESSAGE(MSG_MEDIA_INIT_FAIL);
+      if (marlin_state != MarlinState::MF_INITIALIZING) {
+        if (isSDCardSelected())
+          LCD_ALERTMESSAGE(MSG_MEDIA_INIT_FAIL_SD);
+        else if (isFlashDriveSelected())
+          LCD_ALERTMESSAGE(MSG_MEDIA_INIT_FAIL_USB);
+        else
+          LCD_ALERTMESSAGE(MSG_MEDIA_INIT_FAIL);
+      }
     #endif
   }
 
@@ -516,6 +523,10 @@ void CardReader::mount() {
  * Handle SD card events
  */
 void CardReader::manage_media() {
+  #if HAS_USB_FLASH_DRIVE           // Wrap for optimal non-virtual?
+    driver->idle();                 // Handle device tasks (e.g., USB Drive insert / remove)
+  #endif
+
   static uint8_t prev_stat = 2;     // At boot we don't know if media is present or not
   uint8_t stat = uint8_t(isInserted());
   if (stat == prev_stat) return;    // Already checked and still no change?
diff --git a/Marlin/src/sd/cardreader.h b/Marlin/src/sd/cardreader.h
index 1fa23ececf..1a8843da58 100644
--- a/Marlin/src/sd/cardreader.h
+++ b/Marlin/src/sd/cardreader.h
@@ -143,10 +143,11 @@ public:
   }
 
   /**
-   * Media Detection - Inserted, Mounted, Job Running, Job Paused, etc.
+   * Media Detection - Inserted and Mounted Media
    *
-   * Marlin 2.1.x supports up to two drives, either an SD Card or USB-FD
-   * Onboard SD may have SPI or SDIO interface. USB FD may use MSC.
+   * Marlin 2.1.x supports up to two drives, either an SD Card or USB-FD.
+   * SD Card may have SPI or SDIO interface.
+   * SDIO / USB drives may be shared via MSC when not in use by Marlin.
    */
 
   // No card detect line? Assume the card is inserted.
@@ -169,8 +170,16 @@ public:
   // Mount and release physical media
   static void mount();
   static void release();
+
   static bool isMounted() { return flag.mounted; }
 
+  static bool isSDCardMounted() {
+    return isMounted() && isSDCardSelected();
+  }
+  static bool isFlashDriveMounted() {
+    return isMounted() && isFlashDriveSelected();
+  }
+
   // Handle media insert/remove (including mounting on boot-up)
   static void manage_media();
 
@@ -410,10 +419,17 @@ private:
 
 class CardReader {
 public:
-  static constexpr bool isFlashDriveInserted()  { return false; }
+  static constexpr bool isSDCardSelected()      { return false; }
+  static constexpr bool isFlashDriveSelected()  { return false; }
+
   static constexpr bool isSDCardInserted()      { return false; }
+  static constexpr bool isFlashDriveInserted()  { return false; }
   static constexpr bool isInserted()            { return false; }
+
+  static constexpr bool isSDCardMounted()       { return false; }
+  static constexpr bool isFlashDriveMounted()   { return false; }
   static constexpr bool isMounted()             { return false; }
+
   static constexpr bool isStillPrinting()       { return false; }
   static constexpr bool isStillFetching()       { return false; }
   static constexpr bool isPaused()              { return false; }
diff --git a/Marlin/src/sd/usb_flashdrive/Sd2Card_FlashDrive.cpp b/Marlin/src/sd/usb_flashdrive/Sd2Card_FlashDrive.cpp
index 2ae38c64c0..e6e6f30ae6 100644
--- a/Marlin/src/sd/usb_flashdrive/Sd2Card_FlashDrive.cpp
+++ b/Marlin/src/sd/usb_flashdrive/Sd2Card_FlashDrive.cpp
@@ -30,7 +30,7 @@
  *    3 - perform block range checking
  *    4 - print each block access
  */
-#define USB_DEBUG         1
+#define USB_DEBUG         TERN(MARLIN_DEV_MODE, 1, 0)
 #define USB_STARTUP_DELAY 0
 
 // uncomment to get 'printf' console debugging. NOT FOR UNO!