Very unreliable and poor robustness of this product ! I have did a format with “Quick Format” unchecked in Win 10. The PD169 became “unknown capacity” and i am unable to recover it. After few hot plug and unplug, now became “0 byte”. I opened dispute and waiting for Seller to provide software tool to recover but no response till now as already 6 days. Also waiting for AliExpress to help....