I followed great advice on site and successfully split main SSD and HDD on iMac Late 2014 27". I replaced the HDD with new 1TB SSD. Main SSD works fine after restoring from TM backup. Now i am looking to relocate my user folders e.g. Docs etc to the new 1TB SSD. I followed advice from web but on rebooting the main SSD (original 128G) has disappeared and now unable to access. Possibly the advice i followed was older and not relevant to Sierra. To continue use I have now rebooted using Command / R and reloaded TM backup so I now have both drives active. How can i relocate my user folders and retain both drives? Preferably booting from the man 120G SSD?