Is 2T points of study material in a hard disk big data?
Yes, 1T=1024GB, 2T=2048GB, hard disk 2T is that your computer has 2048GB.
Capacity, 2T=2*1024GB, almost 25 80GB hard disk. Two 1T's will consume one more SATA port one more SATA cable, one more power port, and one more drop of electricity than a 2T. This means that the 2T may appear to be a stacked disk.