First key received defective (not recognized by my PC): Back Amazon that reference me one second.
Second key received: After a month, the retractable system the key started messing around. Some days later, loss of write speed -> SanDisk carrier test after telling me that the key is defective and they send me another ...
I will receive my third key in less than two months that's a lot.
Overall this is a great product when it works but seems fragile (+ box clearly cheap retractable system reliability not top in view of what I have lived components). I do not recommend this.