Synology D4NS01-4G NAS Expansion Memory (DDR4 SODIMM, 4GB, for Synology NAS) - Available from Field Lake, an authorized distributor in Japan.

Synology DDR4 Memory Module

Expands the memory of your Synology NAS. *Please note that this module will not work with any Synology NAS other than those listed below. *Depending on the model, you may need to remove the original memory.

Compatible Models ・Synology DiskStation: DS425+ Available at Field Lake, the authorized distributor in Japan Expansion memory for Synology Manufacturer Model Number: D4NS01-4G *Please refer to the product description for compatible models. Memory Capacity: 4GB