A systems engineer has quadrupled the maximum possible storage on a Raspberry Pi Compute Module 4. By default, the CM4 is available with up to 32 GB of eMMC flash storage, but Ivan Kuleshov has demonstrated that 128 GB is possible.
https://www.notebookcheck.net/Raspberry-Pi-Compute-Module-4-Engineer-demonstrates-that-128-GB-of-storage-is-possible-on-the-tiny-single-board-computer.549929.0.html