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Crucial CT1000X8SSD9 X8 1TB Portable SSD – Up to 1050 MB/s – USB 3.2 – External Solid State Drive, USB-C, USB-A, Black

4.6 out of 5 stars 6,276 ratings

X8 Portable SSD (Up to 1050 MB/s)
1 TB

About this item

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  • Incredible performance with read speeds up to 1050 MB/s
  • Works with Windows, Mac, iPad Pro, Chromebook, Android, Linux, PS4, and Xbox One with USB-C 3.2 Gen2 and USB-A connectors
  • Beautiful and durable design, featuring an anodized aluminum unibody core
  • Drop proof up to 2 metres. Extreme-temperature, shock, and vibration proof
  • Backed by Micron, one of the largest manufacturers of flash storage in the world
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From the manufacturer

PC Mac

Fast, easy storage for your PC and Mac

Quickly and easily add storage to your PC and Mac with the Crucial X8 Portable SSD. Just plug it in — no reformatting required. Back up important photos, videos, and documents with up to 2TB capacity. Encrypt your drive and protect your data using Windows Bitlocker to Go or Apple’s FileVault. Crucial X8 also works with popular endpoint protection services from brands like Symantec and McAfee.

PC Mac

PC & Mac

PS4 XBox One

PS4 & Xbox One




iPad Pro

A Reputation for Reliability


When you need ultimate peace of mind, trust the expert quality and engineering innovation of Crucial, a brand of Micron, one of the leading flash storage manufacturers in the world. Enjoy comprehensive support materials, such as operating instructions for various platforms and articles on maximizing your drive’s performance.

¹ MB/s speed measured as maximum sequential performance of device as measured by Crucial on a high-performance desktop computer with Crystal Disk Mark (version 6.0.2 for x64). Your performance may vary. Comparative speed claims measured as maximum sequential performance of similarly situated portable SSDs, mainstream portable HDDs and mainstream USB flash drives from vertically-integrated manufacturers selling under their own brands as of June 2019.

² Compatibility may vary and may be contingent on device formatting and host capabilities.

³ Latest firmware may be required for operation.

⁴ Compatible Android devices must be able to work with USB Mass Storage over OTG. Operating system updates and reformatting may be required.

⁵ iPadOS 13 required for the Crucial X8 to work with iPad Pro devices with USB-C port.

Up to 7.5 ft/2 m without impact to data on drive on a carpeted floor. Tested by Micron Technology 2019

Customer questions & answers

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Product information

Technical Details

Additional Information

Warranty & Support Return Policy:Regardless of your statutory right of withdrawal, you enjoy a 30-day right of return for many products. For exceptions and conditions, see Return details.


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What's in the box?

  • Crucial X8 Portable SSD
  • USB-C to USB-C (10Gb/s) cable
  • USB-C to USB-A (5Gb/s) adapter

  • Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    6,276 global ratings

    Top reviews from United Kingdom

    Reviewed in the United Kingdom on 15 May 2021
    Style Name: X8 Portable SSD (Up to 1050 MB/s)Capacity: 2 TBVerified Purchase
    243 people found this helpful
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    Reviewed in the United Kingdom on 6 December 2020
    Style Name: X8 Portable SSD (Up to 1050 MB/s)Capacity: 2 TBVerified Purchase
    216 people found this helpful
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    Reviewed in the United Kingdom on 4 February 2020
    Style Name: X8 Portable SSD (Up to 1050 MB/s)Capacity: 1 TBVerified Purchase
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    5.0 out of 5 stars Wow! Just Wow!
    By Mark Smith on 4 February 2020
    Like a lot of people I own a modern MacBook Pro (mine is the 2018 15" version which has 4 x Thunderbolt 3 ports), which you are totally scalped if you want more than 256GB of flash storage. I upgraded from a 2012 MacBook Pro, so really missed the capacity of the SATA SSD I had upgraded that to. I bootcamp my Macs too, which exacerbates the problem. Unlike the old MacBook Pros, the internal storage on modern ones aren't user upgradeable, which is where this beauty comes in!

    I was lucky enough to wait (and WAIT!) for the price to drop around Black Friday, so I got the 1TB model for not much more than the normal price of the 500GB model. I'm so chuffed my patience paid off.

    The packaging is normal Crucial minimalistic and environmentally friendly other than the plastic the SSD is wrapped in.

    Inside the box you get:

    The Crucial X8 SSD
    A user manual
    A dual purpose cable

    The SSD itself is a really lovely and tactile design. Other than two slim plastic inserts for branding and model/serial information it's all black anodised aluminium. It measures 110mm x 53mm x 10mm and weights a svelte 100g. Whilst it's silent in operation (no moving parts), it does get toasty, particularly under load. I haven't experienced any thermal throttling, so hopefully the aluminium case is enough of a heat sink to keep the M.2 NVME SSD inside. It has one single port, which is a USB 3.1 Gen 2 Type C.

    The only thing about the design I don't like is the fact there is no activity/power light. You just have to trust your computer that it's ejected properly prior to removal.

    The supplied dual purpose cable is a USB 3.1 Gen 2 Type C, with a converter from Type C to Type A. This is a great addition and allows backwards compatibility to devices with USB 3.1 and below. The USB 3.1 Gen 2 Type C interface is rated up to 10Gbits/s or 1.25GB/s.

    The Crucial X8 is rated at 1050 MB/s read speed by Crucial, and in testing it's not far off that. The Blackmagic Disk Speed test gave constant results of around 950 MB/s read and 925 MB/s write. Similar results were given in Windows 10 using AS SSD. It sure is quick! The only way you would exceed these speeds would be with an SSD using the Thunderbolt 3 interface to its full potential. Drives using Thunderbolt 3 cost FAR more than the Crucial X8, and unless you spend your whole life transferring huge files I'm not sure the extra cost would justify the real-world benefit.

    My drive is partitioned into two, one partition is for bootcamp with Windows 10; the other partition is a shared data expansion for Windows and macOS formatted as exFAT.

    Booting from the Crucial X8 is actually quicker and more responsive than my desktop PC which has a SATA SSD, and FAR quicker than my retired 2012 MacBook Pro.

    As you can probably tell from the above, I'm extremely happy with my purchase. It's not that often that all my expectations are met, or exceeded with a tech product, but on this occasion, the Crucial X8 ticks all the boxes.
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