I just bought a new 768 Gb SSD iMac and a 3 TB Time Capsule. I have been using a 2010 i7 iMac for 3 years (one TB HDD) and my one TB Time Capsule (3 years old) has been flawless so far. I would like to save those backups of the 2010 iMac "just in case", and utilize the faster speed of WiFI transfer of this newer model of 3TB Time Capsule plus maybe connect another drive into the time capsule for network storage. So should I run 2 separate WiFi networks on different channels one for each iMac and configure Time Machine on the new much faster iMac or if not, how do I configure the new 3 TB Time Capsule as a new WiFi base station that safely backs up the older 2010 iMac plus backs up the new iMac on one WiFi network and save plenty of room on the new Time Capsule for the newer iMac? What other uses can I use the older Time Capsule for on a new network with it's WiFi turned off? There are so many ways to configure the best backup plan and I really need some help. Thanks.