Systems and methods for processing fluid samples are disclosed. Fluid sample processing is accomplished using a series of microfluidic bump arrays include an automated and integrated system for sorting particles from a biological sample, lysing those particles to expose total RNA or DNA, purifying the RNA or DNA, processing the RNA or DNA by chemical or enzymatic modification, to select RNA or DNA molecules by size, or to generate, optionally, a sequencing library. The sequencing library is suitable for use in next generation sequencing ("NGS").
