QNAP TX-800P-US 8-Bay Thunderbolt 2 Storage Expansion Module

Overview

The TX-800P-US is an 8-bay Thunderbolt 2 storage expansion module from QNAP's NAS and storage line, designed to extend the raw capacity of a compatible host system without replacing the host unit itself. If you're running a QNAP NAS that's near its bay limit and need additional spindles for surveillance footage retention, backup targets, or bulk media storage, the TX-800P-US attaches via Thunderbolt 2 to deliver eight additional drive bays through a single high-bandwidth connection. Thunderbolt 2 carries up to 20 Gbps bidirectional — enough headroom for simultaneous read/write across all eight bays in mixed workloads. This is a storage expansion unit, not a standalone NAS; it requires a compatible host to manage drives, RAID, and network access.

Compatibility

The TX-800P-US is designed for use with QNAP NAS units and workstations that carry a Thunderbolt 2 port. Confirm your host device has a native Thunderbolt 2 interface before ordering — USB-C adapters and Thunderbolt 3/4 passive cables are not electrically backward-compatible without an active adapter. Thunderbolt 3 hosts can connect via an approved Thunderbolt 3-to-2 adapter (Apple MMEL2LL/A or equivalent certified adapter), though throughput is capped at Thunderbolt 2 speeds. Verify QNAP firmware support for external expansion on your specific host model via the QNAP NAS compatibility matrix before deployment. Drive compatibility follows the host NAS's supported HDD/SSD list — the expansion chassis itself does not independently qualify drives.

Installation Notes

Thunderbolt 2 daisy-chaining allows up to six devices per port; if other Thunderbolt peripherals share the chain, available bandwidth divides accordingly — plan your chain topology before commissioning. A compatible Thunderbolt cable is required and must be rated for Thunderbolt 2 (not generic Mini DisplayPort cables, which share the same connector form factor but lack the Thunderbolt signal). Power the expansion unit before connecting to the host to avoid hot-plug enumeration errors on some QNAP firmware versions.