What's a reasonable price for a 3TB external hard disk ? cheapest I could find was Rs.8000

Downloading all this stuff via Jio and now my 1 TB hard disk is full so I'm looking for new bigger hard disk but the cheapest hard disk I could find was of Rs.8000 which is difficult for me and I really don't want to spend that much money

should I just but another 1tb or tb drive ? would this be a good question