I got an external hard drive but its not the full capacity?

This is because of marketing. The actual drive capacity is around 720gb, not 750. How they get away with this is saying that "1gb = 1000 mb's" which is utter crap. 1gb is actually = to 1024mb's They round up for simplicity and to make it seem like the drive is actually bigger than it is.

There are currently some huge class action lawsuits because of this, but so far every drive manufacture out there does the same thing.

It's lame. I know.

Actually, I have the same exact problem. 2 years ago I bought an external Freecom 250GB HDD but when I connected it up it was only 233GB. I don't know why exactly this happened but after a while I didn't care about a 17GB loss.

Your loss of over 48GB is too much though. That's like a whole hard drive on a new computer. Good luck on whatever you do.

This is true with any hard disk in the world.

This space is used to store for firmware.

Firmware is something which gives information about hard disk and acts as an in between interface between internal and external of hard disk.

Nobody can do anything about it.

It remains with hard disk whatever you do.

Thank you.

Your operating system is probably only capable of recognizing up to the 702gb's you can partition the drive and set up the remaining 48gb's as a separate(logical drive) start>run>diskmgmt.msc>left click on unassigned portion of drive>format>NTFS

this is natural, nothing can be done.