diff --git a/src/usb.h b/src/usb.h
index ab55866..e99b44c 100644
--- a/src/usb.h
+++ b/src/usb.h
@@ -5,33 +5,69 @@
 #include <pspusbstor.h>
 #include <pspsdk.h>
 
+/** @file usb.h
+ *  @brief USB Module Header File
+ *
+ *  This file contains functions and definitions related to USB operations, 
+ *  including initializing, starting, stopping, and deinitializing USB storage.
+ */
+
+/** @brief Gets the current USB state.
+ *
+ *  This macro retrieves the current state of the USB connection.
+ *  It maps directly to `sceUsbGetState`.
+ */
 #define oslGetUsbState sceUsbGetState
 
 /** @defgroup Usb USB
+ *  @brief USB functions to start/stop USB storage.
+ *  @{
+ */
 
-    USB functions to start/stop usb storage
-	@{
-*/
-
-enum {OSL_USB_ACTIVATED=PSP_USB_ACTIVATED,
-      OSL_USB_CABLE_CONNECTED=PSP_USB_CABLE_CONNECTED,
-	  OSL_USB_CONNECTION_ESTABLISHED=PSP_USB_CONNECTION_ESTABLISHED};
+/** @brief USB State Enum.
+ *
+ *  Enum containing the possible states of the USB connection.
+ */
+enum {
+    OSL_USB_ACTIVATED = PSP_USB_ACTIVATED, /**< USB is activated */
+    OSL_USB_CABLE_CONNECTED = PSP_USB_CABLE_CONNECTED, /**< USB cable is connected */
+    OSL_USB_CONNECTION_ESTABLISHED = PSP_USB_CONNECTION_ESTABLISHED /**< USB connection is established */
+};
 
-/** Initializes USB modules, must be called before oslStartUsbStorage.
-Returns 0 on success.*/
+/** @brief Initializes the USB storage modules.
+ *
+ *  This function initializes the necessary USB modules. It must be called 
+ *  before any other USB storage operations.
+ *  
+ *  @return Returns 0 on success, a negative value on failure.
+ */
 extern int oslInitUsbStorage();
 
-/** Starts USB storage
-Returns 0 on success.*/
+/** @brief Starts USB storage.
+ *
+ *  This function starts the USB storage, making the PSP appear as a USB storage 
+ *  device when connected to a host.
+ *  
+ *  @return Returns 0 on success, a negative value on failure.
+ */
 extern int oslStartUsbStorage();
 
-/** Stops USB storage
-Returns 0 on success.*/
+/** @brief Stops USB storage.
+ *
+ *  This function stops the USB storage, safely disconnecting the PSP from the 
+ *  host system.
+ *  
+ *  @return Returns 0 on success, a negative value on failure.
+ */
 extern int oslStopUsbStorage();
 
-/** Deinitializes USB modules. */
+/** @brief Deinitializes the USB storage modules.
+ *
+ *  This function deinitializes the USB modules, releasing any resources that 
+ *  were allocated during initialization.
+ */
 extern int oslDeinitUsbStorage();
 
-/** @} */ // end of USB
+/** @} */ // end of Usb
 
 #endif