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Small rectangular black portable SSD with rounded edges and USB-C port

Crucial

Crucial X9 4TB Portable SSD CT4000X9SSD9

SKU CH-M5E7-T32A6 MPN CT4000X9SSD9

A 4 TB portable solid-state drive with USB 3.2 Gen 2 read speeds up to 1050 MB/s, drop-proof to 7.5 ft and plug-and-play on Windows, Mac, Android, iPad and consoles

  • Total capacity4 TB
  • Sequential read speedUp to 1,050 MB/s
  • Interface typeUSB 3.2 Gen 2
  • Product colorBlack

Capacity 4TB

Capacity 4TB

  • 4TB capacity stores up to 20,000 photos and 50 hours of video
  • Read speeds up to 1050 MB/s accelerate large file transfers
  • USB 3.2 Gen 2 interface works with Windows, Mac, Android, iPad and consoles
  • Drop proof up to 7.5 feet protects data from accidental falls
  • Shock and vibration resistance ensures reliability in extreme temperatures

Portable 4TB storage

The Crucial X9 CT4000X9SSD9 is a 4TB external solid-state drive built for creators, gamers and anyone who moves large libraries between devices. It connects over USB 3.2 Gen 2 and delivers sequential reads up to 1050 MBps. The drive is drop proof up to 7.5 feet and rated for shock, vibration and extreme temperatures.

Included USB-C cable

A USB Type-C to C cable is supplied in the box so the drive works immediately on Windows, Mac, Android, iPad, Xbox, PlayStation and other hosts. Using the cable on a USB 3.2 Gen 2 port enables the advertised 1050 MBps read speed; on slower ports the drive will still function at the host’s maximum rate.

1050 MBps read ceiling

The single figure that decides fit is the maximum sequential read of 1050 MBps. If your workflow demands sustained throughput above that level, this drive will not meet it; if 1050 MBps satisfies your backup, editing or gaming loads, the 4TB capacity and rugged build make it a practical choice.

How it compares

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

Price $289.99
Pricier than about 68% 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 1,050 MB/s
Typical for this category: the median of 166 items is 1,050 MB/s.
Price per TB $72.50 per TB
Cheaper than about 89% of the 310 comparable items (median $142.00 per TB).

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Specifications

Product
Brand nameCrucial
Product lineX9
Model nameCT4000 × 9SSD9
Total capacity4 TB
Product colorBlack
Performance
Sequential read speedUp to 1,050 MB/s
Ports & slots
Interface typeUSB 3.2 Gen 2
Size & build
Shipping weight0.07 kg
Package size102 × 97 × 17 mm

Other versions of this model

2 more in the same range

Questions about this item

Will the USB 3.2 Gen 2 interface or cable need replacement after heavy daily use?

The drive uses a USB 3.2 Gen 2 interface with an included USB Type-C to C cable; no user-serviceable parts are inside the sealed enclosure.

What limit appears first during sustained transfers at the rated 1050 MBps read speed?

The USB 3.2 Gen 2 interface caps theoretical throughput at 10 Gbps, so the 1050 MBps read ceiling is the first bottleneck you will hit.

How much heat or fan noise does the 4TB X9 produce when running all day?

The X9 has no moving parts or fan; its aluminium chassis passively dissipates heat and the spec lists drop proofing up to 7.5 feet and extreme temperature tolerance.

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