What file transfer protocols does WP phones use? Is there any difference across the range; i.e. do the 'flagship phones' like the 920, 928 etc have a different set of protocols than the cheaper phones like the 520 etc? Any changes within 8.0-8.1 updates?

"...Windows Phone 8 devices do not use Universal Mass Storage for USB (i.e. what you get in Windows Explorer when you connect a standard thumb drive). Instead it uses Media Transfer Protocol, which integrates with Windows Media Player in syncing etc."

Had the question come up related to work. Thanks for the help.