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Crucial CT256M4SSD2BAA 256GB M4 SATA III 6Gb/s MLC 9.5mm 2.5 Inch Internal SSD with 3.5 Inch Adapter Bracket

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Style Name: 256GB M4 + 3.5" Bracket
256GB M4 + 3.5" Bracket
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  • 3.5" adaptor bracket turns standard HDD drive bay into SSD drive bay
  • SATA 6Gb/s (SATA III), backward compatible to SATA 3Gb/s (SATA II)
  • 3-year limited warranty
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Style Name:256GB M4 + 3.5" Bracket

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Product description

Style Name:256GB M4 + 3.5" Bracket

Product Description

The Crucial m4 SSD

Award-winning quality. Award-winning performance.

The award-winning Crucial m4 SSD delivers powerful performance gains for SATA 6Gb/s systems. Designed to empower your system, the Crucial m4 SSD offers faster application load times, faster boot times, and increased durability compared to a traditional hard drive. The results speak for themselves: blazing-fast sequential read speeds of up to 500 MB/s for any file type.

Cutting-edge technology. Quality component testing.

Built with advanced controller technology, Micron proprietary firmware and high-speed synchronous MLC NAND, the Crucial m4 SSD is engineered to deliver consistent, blazing-fast SSD performance. From the extensive research and development that led to its ultimate design, to the hours of testing and validation spent on each NAND component, to rigorous compatibility testing in the Crucial Performance Labs to ensure component functionality, the Crucial m4 SSD is built to last.

Consistently fast speeds. No exceptions and no fine print.

There's a reason the Crucial m4 SSD has garnered numerous international awards since its launch it does what it's supposed to do. No matter what kind of files you are working with on a Crucial SSD, you'll experience high speeds with no drop in performance.

Unlike other SSDs on the market, Crucial SSDs treat all files the same, regardless of whether they are compressed or uncompressed. This is important because the files most people use everyday are videos, mp3s, advanced graphics files and zip files - are compressed files and thus unable to be compressed any further. While many SSDs on the market achieve faster speeds by using file compression, many of the most common file types can not be compressed, resulting in SSDs that often deliver drastically slower speeds than originally advertised. With the advanced technology of a Crucial SSD, however, you will never have this problem!

Crucial quality you can depend on.

Crucial is a trusted name when it comes to SSDs, and that's no coincidence. As a brand of Micron, one of the worlds leading manufacturers of SSDs, we work with our engineers to design, refine, and support our drives. With over 15 years of experience in the memory industry, NAND component testing, and the ongoing development of advanced technology, we continue to innovate without sacrificing what has made us great: high-quality upgrades and outstanding customer service.

Crucial SSDs. Performance you can trust.

More Crucial SSD options

The Crucial v4 SSD delivers substantial SSD performance gains for pre-2011 systems at an affordable price.

The Crucial Adrenaline Solid State Cache Solution

Crucial Adrenaline boosts performance of a Windows 7® PC by up to 8 times1

1 Performance scores after three runs allowing active data to be cached on solid state drive. Scores may vary depending upon benchmark used and system configuration. Test setup: Intel DP67BG motherboard, Seagate Barracuda 750GB hard drive using PCMark Vantage HDD test suite.

Comparison Chart


Crucial m4 SSD

Crucial v4 SSD

Crucial Adrenaline
Interface SATA 6Gb/s (SATA III) SATA 3Gb/s (SATA III) SATA 6Gb/s (SATA III) Best for most systems bought in 2011 or later most systems bought in pre-2011 people who have lots of data on their hard drive Platform PC & Mac PC & Mac Windows 7 Max sequential read/write 500MB/s / 260MB/s 230MB/s / 190MB/s 500MB/s / 95MB/s 4k random read/write 45k / 50k 10k / 4k 45k / 20k Form Factor 2.5' 2.5' 2.5' Capacity 64GB - 512GB 32GB - 256GB 2.5' Faster start-up YES YES YES Faster application loading YES YES YES Faster data transfer YES YES YES Increased ability to multitask YES YES YES Three-year limited warranty YES YES YES Increased Durability & reliability YES YES NO Hard drive replacement & upgrade YES YES NO

Box Contains

  • Crucial m4 SSD
  • Warranty Statement
  • Crucial Easy Laptop Install Kit
  • Data Transfer Software
  • USB to SATA Cable


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Reviewed in the United Kingdom on 6 September 2014
Style Name: 64GB M4Verified Purchase
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Reviewed in the United Kingdom on 21 April 2012
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Reviewed in the United Kingdom on 18 March 2012
Style Name: 128GB M4 + 3.5" BracketVerified Purchase
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