How do I get the full size of my hard drive after a duplication?

The hard drive duplicator copies the exact partition from the source drive to the target drive. Since it is required that you use a target drive that is equal or larger in size than the source drive a portion of the target drive appears as free space. You can append free space to the live partition on the target drive so that the full size of the drive can be utilized.

Note: A partition cannot be extended on an operating system drive that is in use. You must extend the partition when it not being used by the operating system, and ideally when it is still connected to the duplicator.

Extend a partition on a computer running Windows

Note: Do not extend a System Reserved partition. Only extend the primary partition, which is typically the largest in size and formatted with NTFS or FAT32.

After you have successfully duplicated a drive and the target drive is still connected to your computer system (for example, through the duplicator), complete the following:

1. Press the Windows key + R.
2. Type compmgmt.msc and click Ok.
3. In Computer Management, on the left side of the screen, click Disk Management.
4. Find the target drive. It will most likely be at the bottom of the list, have a partition that is the same size as the source drive, and have an unallocated area on the drive.
5. On the target drive, right-click the last partition on the right side of the screen and click Extend Volume.
6. In the Extend Volume wizard, click Next. By default, the remaining drive area is the amount of space used.
7. Click Next > Finish.

The primary partition on the drive now uses the entire drive area.