Hello,
You can choose the option Home >> Account Functions >> Rearrange an Account for that.
Select the desired account from the list.
You may use the Account Search feature to search for an account by domain or by user.
After that choose the partition to which you need to move the account and Click Move Account
Note: To move accounts between hard drives, each hard drive must match the value of /home set in the Basic cPanel & WHM Setup Basic Config section. Any additional home directories which match the value set in Basic cPanel & WHM Setup will also be used for new home directory creations.
For example, /home, /home2, /newhome. If the value does not match the hard drive, you can not move the account. This feature is disabled if left blank.