1 Tb (reads: One tera byte) = 1,000 Gb (reads: Giga bytes). 1 Gb = 1,024 Mb (reads: Mega Bytes)1 TB = 1,024,000 MbThe difference between 1 TB and 750 Mb is thus: 1,024,000 - 750 = 1,023,250 [Mb] Sorry, but Gdogncbd's answer is wrong.
The proper abbreviation is MB for megabytes and GB for gigabytes. Memory modules come in powers of 2 so 1 TB = 1024 GB = 1048576 MB. Disk drives, on the other hand, are usually quoted in decimal because it makes the number bigger. So 1 TB = 1000 GB = 1000000 MB.