Choosing NAS storage & drives is a practical trade-off between enclosure layout, condition, and what arrives in the package. One buyer may prioritize a larger bay count and included caddies, while another may prefer a new, factory-sealed unit. The right choice depends on which part of the setup matters most before purchase.
Quick verdict
Choose the Qnap TS-431P2 Network Attached Storage NAS 4-Bay Personal Cloud if four bays are the priority and you are prepared for a used, unit-only purchase. The power adapter and drives are not included, although four caddies are included. Choose the SYNOLOGY DiskStation DS216play 2 Bay Network-Attached Storage (NAS) Factory Seal if a new, factory-sealed unit is the better fit. The listed prices are $160.04 apart, so the decision is primarily about the setup you want to build rather than a small price variation.
At a glance
| Product | Listed price | Bay format | Condition | Key listed distinction |
|---|---|---|---|---|
| Qnap TS-431P2 | USD 169.95 | 4-bay | Used | Four caddies included |
| Synology DiskStation DS216play | USD 329.99 | 2-bay | New, factory sealed | Black; Ethernet interface |
Where each NAS fits
Qnap TS-431P2

The Qnap wins on its USD 169.95 listed price and the four included caddies. That is the clearest reason to choose it when a shopper wants a lower entry point and can manage the enclosure as a project. The accessory inclusion is specific enough to make the package meaningfully different from a bare unit.
Synology DiskStation DS216play

Synology wins on its black enclosure and Ethernet interface. Those details give it a concrete fit for a setup where appearance and wired networking are part of the brief. For this head-to-head, it is the direct match when those particular enclosure and connection details matter.
Product notes
Qnap TS-431P2 NAS
The Qnap TS-431P2 suits shoppers drawn to the Personal Cloud wording and the NAS role in its full name. That makes it a natural candidate for a home file-storage project where the enclosure is only one part of the build. The limitation is concrete: the unit is sold used and unit only, while the power adapter and drives are not included. Those excluded essentials require separate planning around the enclosure. Choose Qnap when the Personal Cloud designation fits the project and sourcing the adapter and drives separately is acceptable.
Synology DiskStation DS216play
Synology DiskStation DS216play is the clearer match for a shopper whose devices include Android, iOS, iPhone, a laptop, Mac, Memory Vault, or PC. That compatibility list gives the choice a concrete home or small-business use case. The limitation is the USD 329.99 listed price, the higher figure in this comparison, and the two-bay format may not suit someone seeking more bays. Pick Synology when those named devices align with the plan; its price is the central trade-off. That makes the choice easy to frame around the devices you plan to connect.
Final choice by use case
For a project centered on the Personal Cloud role named in the Qnap TS-431P2 title, choose Qnap TS-431P2. For a home or small-business setup involving Android, iOS, iPhone, a laptop, Mac, Memory Vault, or PC, choose Synology DiskStation DS216play. The decision comes down to whether the Personal Cloud use case or the named device ecosystem better matches your plan.