How to replace internal HDD with SSD in Mac Mini? I'm a complete nube to Mac (bought Mac Mini 10/Apr/15). So far I have cloned OSX from Internal HDD to USB SSD which is to become my Boot Disk. The HDD is solely to hold a recovery partition, and Data i.e. Photos, Docs Music - how do I achieve this?
Boot holding the option key and select the SSD to boot. You can also use system preferences to set it as the default boot drive. 

Once the machine will restart (or power on from off) and boot to the SSD, use Disk Utility to erase the HDD and enjoy your new Mac.