My Passport Mac

mon disque dur my passeport for mac est devenu inutilisable. Le backup de Time Machine était “en progression” au moment d’une coupure de courant. Il est reconnu, mais il ne peut pas être examiné, effacé, partitionné… avec aucun outil.
Pouvez-vous m’aider svp, merci d’avance.

You can try the below troubleshooting methods if Time Machine can’t find your backup disk:

• Make sure the backup disk is firmly connected, plugged into a power source, and turned on.
• If connected to network, make sure your Mac and backup disk are on the same network, the disk is turned on, and the network isn’t experiencing problems.
• If connected to another computer, make sure the computer isn’t in sleep.
• Open Time Machine preferences and reselect your backup disk. If you erased your backup disk and began having trouble, reselecting it may fix the problem.
• If you’re using a Time Capsule as your backup disk, use AirPort Utility to make sure it’s set up properly and connected to your network.
• Open a Finder window, then look in the Locations section. Your backup disk should be listed. If it’s not, it may be turned off, defective or currently unavailable on the network.

Further, you can also check the below link:

Hope it helps!