Thanks everyone. @YvesZ I'm still running into a snag. M1 Pro Macbook Pro Sandisk Extreme PRO 4tb Drive plug in - "The disk you attached was not readable by this computer." Upon attempting to mount in disk utility - "Could not mount “disk4s1”. (com.apple.DiskManagement.disenter error -119930868.)" After the ps aux | grep fsck Terminal said - 4869   0.0  0.0 408628368   1648 s000  S+    3:07PM   0:00.00 grep fsck Do all the zeros mean this might not be the solution for my circumstance?

Hi everyone thanks for the info. @YvesZ I was trying this on my sandisk 4tb and got this Terminal reply "4372   0.0  0.0 408628368   1648 s000  S+   11:53AM   0:00.00 grep fsck" Do the zeros mean that this is not the issue with my drive and it may be something else? Thanks for any help you may be able to provide.

Hi @YvesZ thanks for this addition. I have a Sandisk 4td SSD that throws me an error before I'm able to run @jkrosado's command. Despite trying your additional commands I'm still stuck. Terminal replied to ps aux | grep fsck with "4372   0.0  0.0 408628368   1648 s000  S+   11:53AM   0:00.00 grep fsck" Does the 0.0 mean I'm not in a perpetual loop and that this isn't the solution in my case?