Here are a few suggestions based on your requirements -
1. Dell Vostro 3546
This laptop is powered by 4th Gen Intel Core i3 processor at a clock speed of 1.7 GHz. It sports a 15.6 inch a HD LED Backlit Display with Anti-Glare screen at a resolution of 1366x768. Weighing around 2.5 Kg, you can easily carry it around. You get 4GB DDR3 RAM coupled with 1 TB of hard disk space. Integrated Intel HD Graphics 4400 offers smoother experience while performing graphics heavy tasks. It does come with WiFi and Bluetooth connectivity along with two USB 2.0 and one USB 3.0 ports. The laptop comes with Ubuntu reinstalled.
The device is available at Rs. 28700 on Flipkart. You may also get it on Amazon India at Rs. 26465.
2. Dell Vostro 14 V3446
The laptop is powered by Intel Core i3 processor (4th Gen). The clock speed is 1.7 GHz. It weighs around 2 Kg and comes with scratch resistant cover. It has a 14 inch HD LED backlit display at 1366x768 resolution. The antiglare nature of the screen reduces the reflections considerably. You get 4 GB DDR3 RAM to give lag free functioning. The graphics are handled by NVIDIA Graphics with a dedicated 2.0 GB graphics memory. It comes with a 500 GB storage which is, unfortunately, below your requirement. The laptop comes with two USB 2.0 and one USB 3.0 ports along with Bluetooth and WiFi connectivity options.
You can buy this laptop at Rs. 29000 on Flipkart.
Please note that Dell has many laptops meeting your requirements of 1 TB of hard disk space, but you may need to hike your budget of Rs. 30000.
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