If we are talking about the same thing (https://www.btsync.com/en/faq/ https://www.btsync.com/en/faq/) Then they explicitely state that they store the data on

If we are talking about the same thing (https://www.btsync.com/en/faq/ https://www.btsync.com/en/faq/) Then they explicitely state that they store the data on their own servers. Is there another btsync? EDIT: Actually rereading it states they allocate space on their servers which sounds like they store data on their servers but I suppose it's also possible they might not.