Unable to equip a 2nd Teradrive

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I have sent atleast 8 emails to perblue customer support within the past couple months due to not being able to equip a 2nd Teradrive and I still haven't received any response ..When I try to equip a 2nd drive, I get a message stating that I can only equip 2 drives at a time but yet I only have 1 drive equipped. I've heard of quite a few other players having the same prob. Please email me back & resolve this issue..thank you.