Synology 2 bay NAS DiskStation DS220j (Diskless)
| DS420j | DS220j | DS120j | |
| Drive Bays | 4 | 2 | 1 |
| Max Raw Storage Capacity | 64 TB (16 TB drive x 4) (Capacity may vary by RAID types) | 32 TB (16 TB drive x 2) (Capacity may vary by RAID types) | 16 TB (16 TB drive x 1) (Capacity may vary by RAID types) |
| CPU | 4-core 1.4 GHz | 4-core 1.4 GHz | Dual Core 800 MHz |
| Hardware Encryption Engine | ✓ | ✓ | ✓ |
| Memory | 1 GB DDR4 | 512 MB DDR4 | 512 MB DDR3L |
| 1GbE LAN Port | 1 | 1 | 1 |
| USB Port | 2 x USB 3.0 | 2 x USB 3.0 | 2 x USB 2.0 |
| Supported RAID Type | Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10 | Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1 | Basic |
| Maximum IP cameras | 16 | 12 | 5 |
| Power consumption | 21.71 W (Access), 7.88 W (HDD Hibernation) | 12.46 W (Access), 5.06 W (HDD Hibernation) | 9.81 W (Access), 4.68 W (HDD Hibernation) |
