Connecting External Disc using Thunderbolt Adapter

Hi,
I have two WD external drives that are connected to a 27-inch (Mid 2010) 2.93 GHz Intel Core i7Apple iMac
as follows:
1TB WD My Book Connected to the USB Port
3TB My Book Studio Connected to the Firewire 800 Port
Question 1. Is it possible to daisy chain these WD drives by Firewire?
Alternatively, is it possible to connect one drive by Firewire and one drive connected to the iMacs Mini Display Port using a Thunderbolt Adapter Cable?

Problem solved

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