I just bought the Sandisk Extreme 2TB SDSSE61-2TOO. If I plug it using the USB-C cable that came with the SSD in the box into my 2021 M1 Max MacBook Pro 16", I can see the Portable External SSD in About This Mac/Overview/System Report/USB. But I cannot see it in Disk Utility. I get the same results if I restart, if I use al the USB-C ports on my MacBook Pro. Is there anything else I can do? Thanks.
Please refer to the instructions mentioned in the below articles and let us know if the issue is resolved:
Title: Windows Or macOS Cannot Find My Drive (Drive is not detected by host system):
If your 2TB Sandisk Extreme SSD (SDSSDE61) is visible in USB but not appearing in Disk Utility on macOS 12.4, it might indicate a compatibility issue or a drive malfunction. Try using a different USB cable or port, restarting your Mac, and if the problem persists, contact SanDisk support or explore data recovery options.
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SanDisk Extreme SSD Failure: Tips to Prevent from Further Damage