Видео с ютуба Espressif Ide Non Volatile Storage
#11 Espressif IDE || Non Volatile Storage(NVS)|| ESP32
2 - Save STRING value permanently in FreeRTOS ESP IDF to ESP32 flash memory using NVS library
ESP-IDF in CPP 12: Non-volatile Storage Testing
ESP-IDF in CPP 11: Non-volatile Storage Continued
ESP-IDF in CPP 10: Non-volatile Storage and Templates