To all those Mac Experts out there.... I'm desperately looking for your help and advice. I am currently running Sierra on my MacPro 12 Core (Mid 2010). On paper, it's compatible with the new High Sierra update but I'm nervous about the upgrade in relation to one thing... AFPS. I have a 520GB SSH drive plus QTY 3 x 3TB internal hard drives, all with HFS+. I also have a Drobo S (2nd Gen) using Firewire and that has QTY 5 x 3TB hard drives all HFS+ also... will they be all safe from AFPS conversion and if so... will I still be able to move files from system to system. I also use an old MacPro Dual Core running 10.7.5 with QTY 4 x 2TB Hard drives all HFS+ also. I also have a MacBook Pro Touch Bar (2017), so I know that will be fine.... as it's all modern tech.... but that's not my main workflow machine... my MacPro 12 Core is what drives my whole business. Bottom line... will I still be able to copy and move files between the new AFPS and HFS+ systems without any issues... copy errors or file format issues..? Any help or advice would be most welcome.