Time machine help please.
I am using a late 2013 iMac and a LaCie 2TB external HDD as my time machine back up. I am waiting the arrival of a new 27inch iMac and have been researching how to transfer data to the new machine. It would appear the easiest way, (for a techno idiot like me), is to use migration assistant, my dilemma is do I delete the backup folder on the HDD before configuring to the new iMac, or will it use the same folder and access old information. Any advise would be greatly appreciated.