However please note that if you run into issues using disks not on the compatibility list our support won't be able to help.
Also note that in OS4 you can't expand a volume online by more than 8TB over its life and you can't expand a volume beyond 16TB. So you should backup your data, power down remove your disks (label order) and do a factory default (wipes all data, settings, everything) with the new disks in place then restore data from backup.
