It ships with 16GB of DDR4 ECC RDIMM memory as standard, scaling up to 64GB across 4 slots, and the 4 internal 3.5"/2.5" SATA bays can expand to 16 total drives with a single RX1225RP 12-bay expansion unit, plus two internal M.2 2280 slots for SSD caching without sacrificing a drive bay. Dual built-in 10GbE RJ-45 ports (plus a separate 1GbE management port) give genuine high-throughput networking out of the box, and a PCIe Gen4 x8 expansion slot adds room for 25GbE/10GbE NICs or Fibre Channel HBAs. Delivering over 84,000 4K random write IOPS and 2,100/1,500MB/s sequential read/write throughput, it's built for demanding, space-constrained deployments — office-wide file services, backup targets, or virtualization storage — where rack depth or unit height is a genuine constraint. Its short-depth 1U chassis is specifically aimed at shallow racks and network closets that can't accommodate a standard-depth 2U enclosure, without giving up the 10GbE throughput and ECC memory reliability of Synology's larger rackmount units.