Add missing import

Author: sebromero

src/USBStorage.cpp

@@ -1,4 +1,5 @@
 #include "USBStorage.h"
+#include "Arduino_POSIXStorage.h"
 
 // The maximum number of attempts to mount the USB drive
 constexpr auto MAX_MOUNT_ATTEMPTS = 10;
@@ -27,7 +28,6 @@ void USBStorage::removeOnDisconnectCallback(){
     deregister_unplug_callback(DEV_USB);
 }
 
-
 bool USBStorage::begin(){
     int attempts = 0;
     int err = mount(DEV_USB, this->fileSystem, MNT_DEFAULT);