64gb out of 74gb I got the 80gb version

probably 1mb is being counted as 1000kb instead of 1024kb..

also the system configuration needs memory

It's normal, happens with every hard drive.Floppy_Jim

What Floppy_Jim said is correct.

Just to clarify. It happens on every harddrive on any piece of equipment, PS3, PC, Laptop, server, etc... The bigger the HDD the more space you lose as well.

ok thats good thanks : )

Another question how do I delete a online profile and create a new one?
KeepClear

you could create a new user and go from there, you can delete the old user too if you wish