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White square portable SSD with magnetic back and USB-C cable

DATO

DATO ARES Q4 4TB portable SSD White

SKU CH-MHCH-KJQK7

Magnetic 4 TB portable SSD with USB 4.0 Gen 3x2 speeds up to 4000 MB/s read and 3600 MB/s write for direct 4K ProRes HDR recording

  • Total capacity4 TB
  • Sequential read speedUp to 4,000 MB/s
  • Sequential write speedUp to 3,600 MB/s
  • Interface typeUSB 3.2 Gen 2 × 2
  • Form factorPortable
  • Cache memory4 TB

Capacity 4TB

  • Magnetic MagSafe attachment secures the drive to iPhone 15/16/17 Pro Max
  • Read speeds up to 4000 MB/s and write speeds up to 3600 MB/s via USB 4 Gen 3x2
  • Records 4K ProRes HDR video directly to the SSD without intermediate transfers
  • Weighs 40 grams with an aluminium shell measuring 64 x 64.3 x 12 mm
  • Includes a 40 Gb/s USB-C to C cable and a 10 Gb/s USB-C to A adapter

Magnetic 4TB Portable SSD

The DATO ARES Q4 is a 4TB portable solid-state drive that attaches magnetically to iPhone 15, 16 and 17 Pro and Pro Max models via MagSafe. It uses a native USB4 Gen 3x2 interface to deliver up to 4000 MB/s read and 3600 MB/s write speeds. The drive is aimed at mobile filmmakers and creators who need direct 4K ProRes HDR recording without a cable.

Thermals, Noise and Power

The aluminium enclosure weighs 40 grams and measures 64 by 64.3 by 12 millimetres, providing passive heat dissipation with no moving parts. Silent operation is maintained during sustained transfers because there is no fan. Power is drawn entirely from the host device through the USB-C connection, so no external adapter is required.

USB4 Gen 3x2 Interface

The single specification that determines suitability is the native USB4 Gen 3x2 interface running at 40 Gbps. Buyers whose devices only support USB 3.2 Gen 2x2 or slower will not reach the advertised 4000 MB/s read and 3600 MB/s write speeds. The package includes a 40 Gbps USB-C to C cable and a 10 Gbps USB-C to A adapter for broader compatibility.

How it compares

Measured against everything we stock in Portable USB SSDs, at today’s prices. Recalculated every night.

Price $449.99
Pricier than about 81% of the 410 comparable items (median $202.99).
Total capacity 4 TB
Higher than about 90% of the 311 comparable items (median 1 TB).
Sequential read speed Up to 4,000 MB/s
Higher than about 92% of the 157 comparable items (median 1,050 MB/s).
Price per TB $112.50 per TB
Cheaper than about 68% of the 310 comparable items (median $142.00 per TB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameDATO
Product lineARES Q4
Model nameARSQ4-4 TB
Part numberARSQ4-4 TB
Total capacity4 TB
Product colorWhite
Performance
Sequential read speedUp to 4,000 MB/s
Sequential write speedUp to 3,600 MB/s
Storage
Cache memory4 TB
Ports & slots
Interface typeUSB 3.2 Gen 2 × 2
Size & build
Form factorPortable
Overall width6.4 in x 6.4 in x 1.2 in
Product depth6.4 in x 6.4 in x 1.2 in
Overall height6.4 in x 6.4 in x 1.2 in
Product weight40 g
In the box
Included items40Gb/s USB-C to C cable with 10Gb/s USB- C to A adapter

Other versions of this model

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Questions about this item

How do I attach the ARES Q4 to my iPhone 15 Pro Max for direct 4K ProRes recording?

Snap the drive onto the back of the iPhone 15 Pro Max using the built-in MagSafe magnetic connection; the USB4 Gen 3x2 interface then allows direct 4K ProRes HDR video capture to the 4TB drive without a cable.

What component may need replacement after heavy daily use of the magnetic attachment and USB-C port?

The 40Gbps USB-C to C cable and the 10Gbps USB-C to A adapter included in the package are the only accessories subject to wear from repeated plugging and magnetic docking.

At what point does sustained write speed drop during long 4K ProRes sessions on the 4TB model?

The drive is rated for up to 3600 MB/s sequential write; thermal throttling from the aluminum shell may reduce sustained throughput during extended high-bitrate recording.

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