An mSATA SSD is a solid-state drive (SSD) that conforms to the mSATA interface specification developed by the Serial ATA (SATA) International Organization.
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The mSATA SSD has a smaller form factor than a standard SSD and is designed for use with portable, space-constrained devices such as laptops and netbooks. The mSATA specification maps SATA signals onto a PCI Express mini-card connector to enable use with a wide range of applications.
The SATA International Organization referred to the specification as mini-SATA at the time of its announcement in 2009. However, the "m" no longer stands for "mini," and the specification is simply called mSATA.