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I use a ESP32-WROOM-32E-N16 (16 MB SPI flash) with default_16MB.csv partitions table from https://github.com/espressif/arduino-esp32/tree/master/tools/partitions. I need to store multiple files in SPIFFS memory (html for webserver and log file). For that, I use Arduino SPIFFS.h library for ESP32 and it works well until it doesn't work... I get the error : [E][vfs_api.cpp:301] VFSFileImpl(): fopen(/spiffs/log/logFile1.txt) failed. The file exist but I can't open it, and this even if I shutdown the ESP32. I can make it work again only if I reset it with my ESP-Prog board.
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