My LaCie SSD has stopped working.

Graceville wrote:

My LaCie SSD has stopped working since updating to Monterey. It is a USB-C drive. I have a MacBook Air about 3 years old, Intel i5. I plug it in, the lights come on, and the lights flash, but the Mac does not find it or recognise it.

Drives can fail at anytime.

Try a different drive and compare your results...

If this drive is using built in proprietary software, visit Lacie and update the driver/software

If this drive is formatted as NTFS, then update the third party supporting software.

Hello Graceville,

Thanks for using Apple Support Communities. We understand that an external drive isn't recognized on your MacBook Air after recently updating. We're happy to look into this with you.

The steps in the following resource may help with this issue:

If a USB device doesn't work with Mac

If the issue persists, let us know if other devices are recognized when connected to the USB port. Be sure to include specific error messages and any other troubleshooting steps that you may have tried.

Have a great day!

Thank you for your replies. I replaced the connecting cord, and it is now working. So it seems that the cord/plug was damaged or broken.

Did you update to Monterey and did it stop working when you upgraded?

Does it show in DIsk Utility?

Can you try it on another computer?

Thank you for this information.

When I use Disk Utility, the SSD shows up, but as unmounted. See screen shot attached.

LaCie does not show any drivers above iOS 11

They do not have drivers for iOS 12

My Raid no longer works. My laptop sees the drive but my desktop (now with Monterey) does not.