Synology RS1626XS+ 64TB (Synology HAT53) 4-bay XS with 2x 10GbE; 16 GB DDR4 upgradeable to 64 GB (16 GB x4). Built-in two M.2 NVMe slots; PCIe 4.0 slot for optional 10GBASE-T or 10/25Gb SFP+/SFP28 adapter cards; expanding network capabilities. Expandable