Sequoia update stopped access to external hard drive

After I upgraded to Sequoia, my Seagate external hard drive can no longer be connected to my MacBook, doesn't show in the choice and is apparently not properly mounted. I can use it on a PC, but I need it to commute between PC and Mac, so still need to solve the Mac problem. I have tried everything that I tried last time when I was forced to update the system and the same thing happened. Last time Paragon helped me with an NTFS for Mac app that was able to manually mount the disc (and it worked automatically from then on), but now this does no longer work. I checked in Disc utility, but there is no apparent problem. I checked the forums, and there are over 700,000 cries for help on this one alone, and apparently since September 2024, but there seems to be no solution yet? I tried various recommendation, got another NTFS for Mac, etc., etc. Still not working. So, what do I now do? Buy another hard drive?