Extreme Pro 2TB will no longer mount in macOS

Legacy SanDisk Products Extreme Pro Internal SSD
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I recently purchased a Extreme Pro 2TB and reformatted for mac journaled and copied a bunch of files on it. This initial copy seemed to work. But now when I plug it in, it will no longer mount on my MBP. I have tried different cables, nothing seems to make a difference. I have only have this drive for a week.

Does anyone have any ideas?

2 Likes
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HI @apalomba,

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

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You can try the steps below and see if the external SSD will mount on your Mac:

  1. Force mount the SSD in Disk Utility

Select the SSD from the sidebar of Disk Utility > select the external drive under “External,” click Mount.

  1. Run First Aid in Disk Utility

With the drive selected, click First Aid to check and repair file system errors in the external SSD. Then try mounting it again.

  1. Format the SSD
    In this case, you need to back up your important data on the external SSD first. If necessary, recover your files from this unmountable external hard drive before performing a reformat.

Once you’re sure all data are safe, select the drive in Disk Utility, click Erase, choose a format (APFS or exFAT), and recreate the file system so it mounts cleanly. [ A related blog - External Hard Drive Not Mounting Mac? Fix It without Data Loss ]

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Hey Gary,

This issue was 3 years ago! I got rid of that drive and got another one.

But I commend your diligence in following up.

Best,
Anthony