I am using this harddisk from last 3 months. I had many options but I choose only this because of its brand. Segate is the best company for external harddisk. It has USB 3.0, which means, it can trasfer files at more than 20Mbps.
If you want to trasnfer files, like more than 1gb you can easily do it very fast. Its size is small so you can easily carry it everywhere. I am using it without any problem. Its cable quality is good . I will recommend this to everyone.