SanDisk Extreme Portable SSD V2 no longer readable

Just bought a 1 TB SanDisk Extreme Portable SSD V2. Loaded it from my older (Windows 10) desktop, and connected it to my new HP laptop Windows 11 - all good. Was able to read and write from the drive - mapped as D:
Today ( a couple of days later), it no longer recognizes the SSD and says I need to format to continue.

WHY did this happen? I used the SSD straight away and it had no issues. I only put data files on it, and now it’s dead…

Thank you

Hi @Michael_Js,

Have you opened a Support Case? If not opened, for more information, please contact the SD Technical Support team for the best assistance and troubleshooting:
https://kb.sandisk.com/app/ask