Just as the name suggests, UltraQLC is not a type of memory per se, but a mix of Sandisk's BICS 8 QLC 3D NAND, a very advanced proprietary controller with a whopping 64 NAND channel, and firmware.

We bumped up the minimum capacity we recommend from 64 GB to 128 GB for SD cards ... write speeds from UHS-I cards that have DDR memory in them (SanDisk brands this feature as QuickFlow Technology).

The SanDisk microSDXC memory card is a high-end storage option ... The Nintendo Switch OLED which released in 2021 only has 64 GB of storage built-in. The original Nintendo Switch that released ...