Have a problem using Panotour Viewer? Have you encountered a bug that needs fixing? Please post it here. Des difficultés à utiliser Panotour Viewer ? Avez-vous découvert un bug qui doit être fixé? Postez les ici.
No it's not possible in most of the cases. Internal memory or internal SD must be used for that. Only few Android devices will be able to access a "ptv" directory on usb stick.