Dear Brains, I have just migrated my system from iMac-2015 to Mac Mini M4. (Sequoia) It caused a number of issues some of which are sorted. However the files I store on the Pegasus 2 R8 now have a mixture of read write permissions under such listings as 'System', 'Wheel', 'Everyone' and more often than not a spinning wheel that reads 'Fetching'. Sometimes it also reads 'Admin 2 (Me)' which is not a user that exists. These are mainy image files.

Some images I can open and save seamlessly but others I cannot save. Soem I tried saving to my Desktop but when I dragged them to the files in the R8 and deleted them from the desktop they also deleted from the R8. Apple advise reformatting to AFPS which as far as I can tell will erase everything (all 26Tb of it) The work is backed up to external drives but it also seems usings Apple's Disk Utility means a Raid 5 set up with AFPS is not viable. (It was set up as a stripe with redundancy disk which I believe to be Raid 5) as well as a partition for Time Machine which is now no longer needed. 

I use Lightroom to catalogue my work and have subdivided the R8 disks into sections 1A - 9A which I make basic mirrored back ups of on disks 1B - 9B via a hard drive enclosure using Chronosync.

Does anyone have suggetsions as to the best way to reformat the R8 disks to make them work with the Mac Mini? I was hoping not to erase them but cannot see another way.

I was thinking Softraid may be the way to go instead of Apple Disk Utility as I may be able to preserve the Raid 5 set up with AFPS or perhaps I just have to go for Raid 0 and rely on my mirrored back ups if there is an issue.

Thank You

Chris