Which NAS devices support the fastest data transfer rates?

Product ⇅ Price ⇅ Storage Capacity (TB) ⇅ Number of Bays ⇅ Transfer Speed (MB/s) ⇅ Expandable Storage ⇅ RAID Support ⇅ Power Consumption (Watts) ⇅
QNAP TVS-h874
US 		£2612.00 ≈ — 8 Up to 3313 MB/s read and 3232 MB/s write with dual 25GbE expansion; 590 MB/s with dual 2.5GbE ✓ ✓ 81.865 W typical operating power; 58.127 W disk standby

The QNAP TVS-h874 is an eight-bay ZFS-based NAS with dual 2.5GbE networking, two M.2 PCIe Gen 4 slots and two PCIe Gen 4 expansion slots. It suits businesses, creative teams and virtualization users who need strong data protection, SSD caching and high-speed networking.

★ Ideal for

It supports dual 2.5GbE for up to 590 MB/s sequential throughput and can reach up to 3313 MB/s read and 3232 MB/s write with a 25GbE PCIe expansion card, making it suitable for fast data-transfer workloads.

Sources:
QNAP Shop Australia QNAP UK Store
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Synology DS1823xs+
US 		£1475.28 ≈ 160 TB raw 8 3100 MB/s read, 2600 MB/s write ✓ ✓ —

The Synology DS1823xs+ is an 8-bay, diskless NAS designed for small and medium-sized businesses that need high-performance centralized storage. It includes built-in 10GbE networking, supports up to 160 TB of raw capacity before expansion, and can scale with additional drive bays, making it suitable for demanding file serving, backup, virtualization, and surveillance workloads.

★ Ideal for

This NAS suits users seeking the fastest data transfer rates because it delivers up to 3100 MB/s sequential read and 2600 MB/s sequential write performance through its built-in 10GbE connection, with support for networking upgrades up to 25GbE.

Sources:
Bechtle IT-Planet
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UGREEN NASync DXP6800 Pro
US 		£683.65 ≈ 208TB 6 SATA bays and 2 M.2 NVMe bays Up to 2500MB/s ✓ ✓ 785Wh per 24 hours

The UGREEN NASync DXP6800 Pro is a high-performance, diskless NAS with six SATA bays, two M.2 NVMe slots, dual 10GbE ports, and Thunderbolt 4 connectivity. It suits creators, power users, and small teams handling large media files, demanding backups, virtualization, or collaborative workflows.

★ Ideal for

This NAS supports fast data transfers through dual 10GbE ports with aggregated speeds up to 2500MB/s, plus two Thunderbolt 4 ports with theoretical speeds up to 40Gb/s, making it suitable for high-speed network and direct-attached workflows.

Sources:
UGREEN US UGREEN UK
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