1.) Clone the disk currently containing the
Users folder. Use any cloning software you want to, here's a video I've made about cloning a disk with free
EaseUS ToDo (
http://www.todo-backup.com/download/). The video will show how to clone a Windows system disk but the method is exactly the same to clone any disk:
(Video from the Ten Forums
video thread.)
Clone the disk to new replacement disk, the one where you want to move the Users folder.
2.) When cloning is done, shut down the PC. Replace the old disk containing the Users folder with the new clone.
3.) The drive letter should be correct on the new drive but because it is an essential detail for this scenario to work, I would in any case want to be absolutely sure about it. Therefore I suggest you boot the PC with Windows 10 install media (DVD or USB).
When the setup shows the first dialog, the language, formats and input method selection, press
SHIFT + F10 to open the
Command Prompt:
4.) Use
Diskpart command to check / change the drive letter of the new disk containing the cloned Users folder to exactly the same than the old disk had. If the old disk was D:, be sure to assign D: to this new disk.
5.) Close the Command Prompt, close Windows setup and let the PC restart normally:
6.) When restarted and on desktop, use Windows
Disk Management to expand the partition on the new disk. Example: if the old disk was 500 GB, all of it in one partition used as D: drive for the user profiles, and the new disk is 1 TB, you will notice that the new disk at the moment has the D: partition as 500 GB and the other 500 GB as unused space (when cloning, the target will be exactly the same size as the source).
You can increase the size of the user profile partition now simply by extending it, claiming the unused space.