Side-by-side specifications of the Synology FS1018 and FS3420, from official datasheets. Differences are highlighted.
| FS1018 | FS3420 | |
| CPU | Intel Pentium D1508 | Intel Xeon D-1739 |
| Cores / threads | 2/2 | 8/16 |
| RAM (base) | 8 GB | 32 GB |
| RAM (max) | 32 GB | 192 GB |
| Drive bays | 12 | 24 |
| Expandable to | 36 | — |
| M.2 slots | 0 | — |
| Network | 4x 1GbE | 2x 10GbE RJ-45 |
| 10GbE | optional | yes |
| Max raw capacity | 288 TB | 1 PB |
| Hot-swap | yes | yes |
| Form factor | desktop | 2U rackmount |
| Released | 2018 | 2026 |