DS220+ compatible RAM upgrade System Memory 4 GB DDR4 Memory Module Pre-installed – Soldered 2 GB (2 GB x 1) Total Memory Slots 1 Memory Expandable up to 6 GB (2 GB + 4 GB) official The max Synology recommends is 6GB DDR4. But you CPU spec says you could in theory upgrade up to … Continue reading DS220+ compatible RAM upgrade