That's approximately 1,024 gigabytes. How many terabytes do you own is the question. And since you're a regular user, you at least, will know about what you frequently use.
TR
TB
TY
TE
6
5
4
3
700
400
500
600
2009
2006
2007
2008
120
110
100
90
1428
876
357
2678
367
123
450
212
50
100
150
200
10^10
10^14
10^3
10^12
160 TB/s
230 TB/s
67 TB/s
90 TB/s