Had same problem with M1 Mac mini. Apple support was very helpful taking me through two levels of support. Got escalated to engineers that identified the problem as a change in how drivers are installed. Supposedly the information was provided to LacIe well ahead of time to prepare, they did not prepare. Reached out to LaCie, after several techs having no clue, I got a written response back acknowledging the problem and stating that they were working on it. I sent a follow up complaint as their website under support still was not acknowledging the problem a month into it and finally they posted its as a known problem a couple of weeks back. So wait and see, but it is a problem with the Marvel drivers and there is no work around until re-written as I was told.