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Western Digital PR4100 narrowly beats the Synology DS1821+ in the nas storage category, especially in value ($599 vs $799), scoring 51 vs 47. If you want the better overall nas storage, Western Digital PR4100 is the recommended choice.
Picking Western Digital PR4100 over Synology DS1821+ means trading these off.
Nothing meaningful — Western Digital PR4100 matches or beats Synology DS1821+ on every measured spec.
Scores are relative within the nas storagecategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
| Spec | Western Digital PR4100W | Synology DS1821+ |
|---|---|---|
| Price | 599$✓ | 799$ |
| RAM | 4GB | 4GB |
| OS | My Cloud OS 3 | DSM 7.2 |
| Weight | 1100g | 1100g |
| Dimensions | 170 x 150 x 220 mm | 260 x 193 x 166 mm |
| Colors | Black | Black |
Buy Western Digital PR4100 if…
Buy the Western Digital PR4100 if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy Synology DS1821+ if…
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Western Digital PR4100 narrowly beats the Synology DS1821+ in the nas storage category, especially in value ($599 vs $799), scoring 51 vs 47. If you want the better overall nas storage, Western Digital PR4100 is the recommended choice.
Yes, Western Digital PR4100 scores higher overall (37 vs 60).
Western Digital PR4100 is cheaper at $599 vs $799 for the Synology DS1821+.
Buy the Western Digital PR4100 if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Reviewed by VersusMatrix Editorial Team
Last updated: April 25, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.
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