Is tata photon plus(Wireless broadband) is for huge data downloads?

No no no... Not at all. Its just ok for browsing webpages or checking emails. It offers a downloading rate of max 30-40 kbps irrespective of plan you've chosen, which isn't good for downloading huge amount of data. On the other hand, it will be highly costly if you'll download such huge data, that you wouldn't like to afford it. I have used it & its not worthy at all. So just go with some Broadband plan.