When we first looked at Crucial's MX300 drive it was only available as a limited edition 750GB model. Since then, the production of the 3D TLC NAND that the MX300 uses has reached a level to enable a fully-fledged product line up with 275GB, 525GB, 1TB and the flagship 2TB models. Along with the new additional capacities in the standard 2.5in format comes a range of MX300 M.2 SATA interfaced models available in 275GB, 525GB and 1TB variants.