GHOST to be a backup, it is necessary to take up how much disk space? ?

if only general backup C set in the hundreds of M to 1G multi-point, if you back up overall, then back to the relative Great point.2.67G GHOST after general can be a little more than half of the reduction.That it is up to you to back up the partition inside the file size 1, 10.But in general, if you back up the C disk, then should not (in general we will not film on the software C plate – the system disk), if it is to back up other divisions, you have to look forward to partition inside the file size