As I using External WD Passport with 1TB storage, it has capacity to keep reliable backup secure and it can be connect with 2.0 and 3.0 USB port that perform transfer files very fast. WD passport is availble in the market with different storage capacity ( 1TB, 2TB, 3TB and 4TB ) . It keeps files very secure when data is freeing to harddisk storage. 1TB WD passport is available around @ Rs. 4100/- with different colors blue, black and white and can be buy online site flipkart, amazon etc.