This report presents a Circuit Analysis of the Sandisk/Toshiba 05138_064G 64-layer 3D NAND flash The circuit blocks extracted and analyzed for the report include the memory access (memory array and peripherals for one plane), voltage generators, data path and address path, and portions of control. This report also includes layout data to allow the audience to cross-probe devices and signals of interest to allow visual correlations between the schematic and layout information for a deeper understanding of the circuit functionality and design.