He most definitely won't get USB powered 2TB drives for anywhere near 7k.
Here is the link you requested OP:
External hard disks - Buy External hard disks Online at Best Prices in India - Laptop Accessories : Computers | Flipkart.com
My Personal suggestion is to go for the WD My Book as it has USB 3.0. You'll really appreciate the speed if you have a computer with USB 3.0 ports.
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