"Dual" and "Quad" bay external enclosures are quite common ... don't recall seeing a "Tri" bay enclosure. Did a quick scan of "the egg" and found the following "Quad" bay enclosures ... Aluratek CyClone ACQES350F, AMS DS-2340SES, AMS DS-2350S,AMS VENUS ES5 DS-315SES, Galaxy METAL GEAR 4500M...
There are know issues with the firmware on some 7200.11 drives ... go to the Seagate Website and check to see if you drive is effected ... if so, you can attempt to contact Seagate to see if they will "fix your bricked drive" (IOW, recover your data).
As a last resort, you might take try ...
You should be able to format the drive from the command line using DISKPART ...
C:\Windows\system32>diskpart
DISK PART> list disk
DISKPART> select disk n (where n is the number of the thumb drive found via list disk)
DISKPART> clean
DISKPART> create partition primary
DISKPART>...