The Crucial m4 SSD range has been launched by Lexar Media, using 25nm technology NAND flash created by parent company Micron.

The 2.5in SSDs come in 64GB, 128GB, 256GB and 512GB models and are the successors to the RealSSD C300 range.

The Crucial m4 SSD reaches read speeds of up to 415MB/second, a 17 percent increase over its predecessor, according to the company. Write speeds on the 512GB capacity model can reach up to 260MB/s, a 20 percent boost over the fastest C300 drive.

You can pay £95.99 for a 64GB SSD; £183.59 for a 128GB SSD; £367.19 for a 256GB SSD; or £735.59 for a 512GB SSD. They can be bought direct from Crucial and come with a three-year warranty.

"The new Crucial m4 SSD builds on the enormous success of its predecessor, the Crucial RealSSD C300," said Robert Wheadon, worldwide senior product manager at Lexar Media.

"As a subsidiary of Micron Technology, we're in the unique position of leveraging Micron's NAND development and manufacturing expertise for our Crucial branded SSDs. These next-generation m4 SSDs offer customers higher capacities and even greater performance at affordable prices," he continued.