When my 2017 iMac arrives, I intend to use my current iMac (2013) as a second monitor by connecting them with Thunderbolt. So my question is, will that Thunderbolt connection also grant me access to drives connected to the slave iMac whilst in screen share mode? To complicate things, the 2013 iMac is actually running OS through an external SSD, as the internal drive is fried. So what I want to do is actually access that external SSD firstly through its USB connection to the 2013 iMac and then through the Thunderbolt connection to the 2017 iMac. Does that seem like a viable arrangement?