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Compact black-grey desktop enclosure with single 3.5 or 2.5 inch SATA bay and four Thunderbolt ports

OWC

OWC miniStack STX OWCT4MSS000 Thunderbolt 4‑port external hard drive enclosure, diskless, 3.5″/2.5″ SATA bay

SKU CH-4EXY-14JV8 MPN OWCT4MSS000

Stackable, diskless enclosure adds a 3.5″ or 2.5″ SATA bay plus four Thunderbolt ports and up to 96 W charging

  • Total capacityDiskless
  • Interface typeThunderbolt
  • Form factor3.5 in (8.89 cm)
  • Product colorBlack - Gray

Capacity Diskless

Cache N/A

  • Up to 96 W notebook charging via Thunderbolt 4
  • Real-world speeds up to 770 MB/s for 4K workflows
  • Three Thunderbolt ports plus SATA bay for mixed device expansion
  • Whisper-quiet aluminium housing with internal heatsink and cooling fan
  • Stackable design matches Mac mini footprint since 2005

Stackable Thunderbolt 4 expansion

The OWC miniStack STX is a diskless desktop enclosure that adds a single 3.5-inch or 2.5-inch SATA drive bay and four Thunderbolt 4 ports to Macs, PCs, iPads and Chromebooks. It provides up to 96 watts of notebook charging power while expanding connectivity for storage, displays and accessories.

Thunderbolt 4 bandwidth and daisy-chain limits

The four Thunderbolt 4 ports share a total bandwidth of 40 gigabits per second, capping real-world drive speeds at roughly 770 megabytes per second. Users can daisy-chain up to five Thunderbolt devices, connect three USB devices and drive two displays from the same hub.

Single SATA bay with NVMe slot headroom

The internal bay accepts one 3.5-inch or 2.5-inch SATA HDD or SSD, while an additional NVMe M.2 PCIe slot allows a second drive for boot or cache duties. This combination suits 4K video editing and large backups, but the single SATA bay limits maximum capacity to one high-capacity drive at a time.

How it compares

Measured against everything we stock in High-Capacity External Drives, at today’s prices. Recalculated every night.

Price $196.99
Cheaper than about 78% of the 144 comparable items (median $379.99).

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Specifications

Product
Brand nameOWC
Model nameOWCT4MSS000
Part numberOWCT4MSS000
Total capacityDiskless
Product colorBlack - Gray
Ports & slots
Interface typeThunderbolt
Thunderbolt 3 supportYes
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size348 × 246 × 86 mm

Other versions of this model

1 more in the same range

Questions about this item

Should I pick the 3.5″ or 2.5″ SATA bay for my drive?

The single bay accepts both 3.5″ and 2.5″ SATA drives, so you can install whichever form factor you already own or plan to buy.

What does the 770 MB/s real-world speed mean for 4K video editing?

That throughput lets you play back and render 4K footage directly from the enclosure without dropping frames.

How do the four Thunderbolt ports limit total bandwidth?

All four ports share the 40 Gbit/s Thunderbolt link, so combined traffic from drives, displays and accessories cannot exceed that ceiling.

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