Back up of mac pro?

What external equipment can be used to back up mac pro.  Like a case that has hot swappable hard drives or ssds. Powered by Thunderbolt. 
Curt Ewing

For the next Mac Pro?  or current?
OS X is fussy  about ejecting a drive safely first but Firewire, USB (2 and 3) as well as some eSATA  (depends on the host controller).
Most don't hot swap SSDs.
There are drive docking stations for USB2/3 and eSATA.
Watch out for drives with their own bus powered.
And seeing how you want Thunderbolt, my guess is you don't have a Mac Pro but rather a MacBook Pro.

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