Are you SURE it connected MTP mode? If it really does use Media Transport Mode then it will also have .System folder in it's file system. Maybe you saw it in Device Manager in preboot mode but then it's not browsable in preboot like in MSM or MTP.
Even if present on the device, .System cannot be seen if the device is in MTP mode. Even in MSM (Mass Storage Mode) it is a hidden folder in Windows by default unless you change that under Control Panel>File Explorer Options (or "Folder Options" in earlier Win OSs)>View.
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