I have two of these identical Fortress drives. I just copied 894GB from one drive to another at an average speed of 113MB/s (USB 3.0, Thinkpad P50). This is impressive with rotating drives. Testing individual drives with ATTODiskBenchmark showed speeds of 140 MB/s. Please note that for some reason when using the closest USB port on my Thinkpad P50 it showed a low speed (40MB/s or so) and the other three USB ports showed 140MB/s but they should all be USB be 3.0. Because the Fortress drive has a fixed USB cable, I wasn't able to test it with a USB-C port.
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