Key disappointing

I have not checked if the speed of the USB drive is compatible with what can be expected from a USB 3.0 drive.
But this is not in performance that this key disappointed me.
It is not at all practical. The USB connection is accessible by sliding the green part. Unfortunately, there is no blocking, the connection returns to his base when trying to connect.
Care should be taken to keep pressing the green part to connect with the computer.
In addition, Mac or PC, the key was not always consistently recognized during my first tests, the key is formatted in FAT32 or Mac format.
This is a key that suffers from a large ergonomic flaw I would not recommend to someone not knowing what to do in the case of a key reluctant to be recognized.
I regret this purchase.