The Synology FlashStation FS2017 is a 4K storage solution designed for use by enterprise users looking for high performance and reliability. The device is further enhanced by the fact is it covered by Synology's 5-year limited warranty and the Synology Replacement Service. The FS2017 can be expanded up to 128GB DDR4 of memory. Please note that Synology NVR's are supplied without hard drives. We recommend the WD Purple HDDs for this product. The FS2017 uses RAID F1 to alleviate the worry of all the drives failing at the same time, by unevenly distributing workload to the different drives in order to improve the resilience of the device. This item may not be available for immediate delivery. Please check with us before purchasing as it could take 7-10 days to fetch from Synology. User Guide Hardware Guide Learn More