I have what was billed as 1 TB of hard drive space, although Windows only says 917 GB. Of that space, "only" 113 GB is used, which is still bigger than my last computer's entire hard drive.

____________________

'Cause when you've given up,
When no matter what you do it's never good enough,
When you never thought that it could ever get this tough,
That's when you feel my kind of love.

It's probably just another way for companies to screw over their customers. Counting in base 10 gives them a higher number, so they'd sell more hard drives that someone who uses the more honest binary measure.

Back in the days of floppies, it was common for floppy manufacturers to use a weird hybrid 1024000-byte megabyte, which was neither a decimal 1000000 bytes nor a binary 1048576 bytes. That always bugged the hell out of me.

____________________

'Cause when you've given up,
When no matter what you do it's never good enough,
When you never thought that it could ever get this tough,
That's when you feel my kind of love.