 As a result, solid-state storage devices exist in different capacities, physical layouts and dimensions, using various interfaces and providing different feature sets.Less complex solid-state storage devices such as memory cards use simpler, slower interfaces such as the one-bit SD interface or SPI, while more sophisticated high-performance devices use faster interfaces such as Serial ATA (SATA) or PCI Express (PCIe) paired with logical device interfaces such as AHCI or NVM Express (NVMe).Types of flash-based solid-state storage devices include the following