diff --git a/drivers/usb/include/usb/msd/USBMSD.h b/drivers/usb/include/usb/msd/USBMSD.h
index a570df7..b516f91 100644
--- a/drivers/usb/include/usb/msd/USBMSD.h
+++ b/drivers/usb/include/usb/msd/USBMSD.h
@@ -249,8 +249,8 @@
     // endpoints
     usb_ep_t _bulk_in;
     usb_ep_t _bulk_out;
-    uint8_t _bulk_in_buf[64];
-    uint8_t _bulk_out_buf[64];
+    uint8_t _bulk_in_buf[512];
+    uint8_t _bulk_out_buf[512];
     bool _out_ready;
     bool _in_ready;
     uint32_t _bulk_out_size;
diff --git a/drivers/usb/source/USBDevice.cpp b/drivers/usb/source/USBDevice.cpp
index 6d3cfc8..0181561 100644
--- a/drivers/usb/source/USBDevice.cpp
+++ b/drivers/usb/source/USBDevice.cpp
@@ -53,7 +53,7 @@
 #if defined(MAX_PACKET_SIZE_EP0)
 #undef MAX_PACKET_SIZE_EP0
 #endif
-#define MAX_PACKET_SIZE_EP0 64
+#define MAX_PACKET_SIZE_EP0 512
 
 #define USB_MIN(a, b) ((a) > (b) ? (b) : (a))
 
diff --git a/drivers/usb/source/msd/USBMSD.cpp b/drivers/usb/source/msd/USBMSD.cpp
index fcf416c..c5cde22 100644
--- a/drivers/usb/source/msd/USBMSD.cpp
+++ b/drivers/usb/source/msd/USBMSD.cpp
@@ -56,7 +56,7 @@
 #define DEFAULT_CONFIGURATION (1)
 
 // max packet size
-#define MAX_PACKET  64
+#define MAX_PACKET  512
 
 // CSW Status
 enum Status {