Sony company is second position in the world.sony 2TB External hard disk you can more data save.you can travel one place to another place it is very usefull.1024KB= 1MB, 1024MB= 1GB, 1024GB= 1TB.so 2TB is a more space.sony 2TB External hard disk price 1000 to 8000.i am use my data will be safe always and password protection.sony 2TB External hard disk very good looked and slim.