Unabe to read an exFAT usb key

Hello guys, first time on this forum since I bought a Macbook Pro last week. I'm actually running on MacOS 10.14.4 but I've got a problem with one usb key.

This usb key (64go) was on NTFS before and I knew that my mac was supposed to only read it. But it never worked. Everytime i plug it, I got the message " The disk you inserted was not readable by this computer " and it asked to "Initialize", "Ignore" or "" Eject".  So i tried with another NTFS usb key (8go) and it worked fine. I even tried the trial version of the Paragon software "NTFS for mac" and i was able to write on it. But with the "big" one, i always have the same problem. So I decided to format to ExFAT, format that MacOS is supposed to read/write without a problem. But still, I got the same error message. And as you can see, my usb key is split it 2 partitions whereas i never did this.After reading a lot of forums, I've tried stuff with the utility disk, I tried to mount, erase, partition etc... but i always got an error :"Impossible to modify the partition card. Operation failed". So i went with the terminal and the "diskutil list disk2" command showed me this :

/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *63.3 GB    disk2
   1:        Apple_partition_map                         8.2 KB     disk2s1
   2:                  Apple_HFS                         6.7 MB     disk2s2
   3:                  Apple_HFS                         14.4 MB    disk2s3

For my mac there's 3 partitions active and the 0 has an * but i don't know why.

Then i tried this command : "sudo fsck_exfat /dev/disk2" and it showed me this :

** Checking volume.
** Checking main boot region.
   Main boot region is invalid.  Trying alternate boot region.
** Checking alternate boot region.
   Alternate boot region is invalid.
** The volume  could not be verified completely.

Honestly I'm completely lost right now. Idk what to do.

Thanks in advance for your help and sorry for my bad english, I'm french.

EDIT : I don't know if it can help but here's the model of my usb key. https://www.amazon.fr/HyperX-3-0-Datatraveler-Gaming-DTHX30/dp/B0068INUOQ