Need to buy extarnal HDD

1 TB costs more-
Flipkart.com: Seagate FreeAgent GoFlex Kit 1TB Hard Drive: External Hard Drive

while a 500 GB is nicely in budget-
Flipkart.com: WD Essential USB Passport Edition 2.5 Inch 500 GB External Hard Disk: External Hard Drive

Full list here

kuch months phele liya hota toh better hota....i bought 1TB@4500/-...
Now it Cost around 6600/-...just wait few months....the rate will go down....but not as before....