seagate drive not working with monterey

are you using any of seagate's preloaded software on the drive (or installed such software yourself) that supposedly makes the drive "Mac ready"? if yes, that could be the cause of your issue. when you use software from just about any manufacturer for their storage device you run the risk of that same software not being compatible with macOS updates / upgrades. it can cause the software to stop working. at best this will cause you a headache. at worst it can render your data inaccessible. it is always best to use disk utility to erase and format a drive before use to remove any preloaded software.

please see Erase and reformat a storage device in Disk Utility on Mac - Apple Support

Open Activity Monitor in Utilities, View>All Processes, sort on Name, see if fsck is running, if so force qui it.

rodg495 wrote:

I've used this seagate drive many times in the past with the previous Catalina IOS. I installed the newer Monterey OIS as supplied by Apple. Now, I plug in the Seagate drive and it is not recognized . I have not installed any other new software.

ok. but if the drive was preloaded with seagate software when you first starting using it, it is entirely possible that the software stopped working with your upgrade to Monterey.

I have tried the drive on my daughter's Mac Air and get the same issue.

and is her Mac on Monterey as well? if she is still on Catalina and the drive still won't work, then it may not be a software related issue.