The Ayos HCS allows you to manage and setup your disks either standalone, RAID0, RAID1 or RAID5. The options allowed depends on the amount of "user" disks the system has available and if they are in use already.
During ordering you can add 2x SATA SSDs to your Ayos HCS. If you want to extend the amount of storage afterwards you can connect up to 4 extra USB external disks. The system will detect your connected disks and allow you to format and assign a filesystem to use.