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esp_vfs_spiffs_conf_t conf = {
.base_path = "/abcdefghi_files", .partition_label = NULL, .max_files = 4, .format_if_mount_failed = false};

void storageInit() {
    static const char* tag = "storageInit";
    ESP_LOGD(tag, "storageInit() called");
    esp_vfs_spiffs_conf_t conf = {
        .base_path = "/abcdefghi_files", .partition_label = NULL, .max_files = 4, .format_if_mount_failed = false};

    // Use settings defined above to initialize and mount SPIFFS filesystem.
    // Note: esp_vfs_spiffs_register is an all-in-one convenience function.
    esp_err_t ret = esp_vfs_spiffs_register(&conf);

    if (ret != ESP_OK) {
        if (ret == ESP_FAIL) {
            ESP_LOGE(tag, "Failed to mount or format filesystem");
            throw std::runtime_error("fail to mount");
        } else if (ret == ESP_ERR_NOT_FOUND) {
            ESP_LOGE(tag, "Failed to find SPIFFS partition");
            throw std::runtime_error("no partition");
        } else {
            ESP_LOGE(tag, "Failed to initialize SPIFFS (%s)", esp_err_to_name(ret));
            throw std::runtime_error("fail to init");
        }
        return;
    }

    size_t total = 0, used = 0;
    ret = esp_spiffs_info(NULL, &total, &used);
    if (ret != ESP_OK) {
        ESP_LOGE(tag, "Failed to get SPIFFS partition information (%s)", esp_err_to_name(ret));
    } else {
        ESP_LOGD(tag, "Partition size: total: %d, used: %d", total, used);
    }
}

D (1823) storageInit: storageInit() called
D (1833) partition: Loading the partition table
D (1843) SPIFFS: SPIFFS_mount sz:0 logpgsz:0 logblksz:0 perasz:0 addr:00000000 fdsz:192 cachesz:1124

D (1923) SPIFFS: page index byte len: 256

D (1923) SPIFFS: object lookup pages: 1

D (1923) SPIFFS: page pages per block: 16

D (1923) SPIFFS: page header length: 5

D (1933) SPIFFS: object header index entries: 87

D (1933) SPIFFS: object index entries: 124

D (1943) SPIFFS: available file descriptors: 4

D (1943) SPIFFS: free blocks: 255

D (1953) SPIFFS: SPIFFS_unmount

E (1953) storageInit: Failed to initialize SPIFFS (ESP_ERR_INVALID_ARG)

#
# SPIFFS Configuration
#
CONFIG_SPIFFS_MAX_PARTITIONS=3

#
# SPIFFS Cache Configuration
#
CONFIG_SPIFFS_CACHE=y
CONFIG_SPIFFS_CACHE_WR=y
# CONFIG_SPIFFS_CACHE_STATS is not set
# end of SPIFFS Cache Configuration

CONFIG_SPIFFS_PAGE_CHECK=y
CONFIG_SPIFFS_GC_MAX_RUNS=10
# CONFIG_SPIFFS_GC_STATS is not set
CONFIG_SPIFFS_PAGE_SIZE=256
CONFIG_SPIFFS_OBJ_NAME_LEN=128
# CONFIG_SPIFFS_FOLLOW_SYMLINKS is not set
CONFIG_SPIFFS_USE_MAGIC=y
CONFIG_SPIFFS_USE_MAGIC_LENGTH=y
CONFIG_SPIFFS_META_LENGTH=4
CONFIG_SPIFFS_USE_MTIME=y

#
# Debug Configuration
#
CONFIG_SPIFFS_DBG=y
CONFIG_SPIFFS_API_DBG=y
CONFIG_SPIFFS_GC_DBG=y
# CONFIG_SPIFFS_CACHE_DBG is not set
CONFIG_SPIFFS_CHECK_DBG=y
CONFIG_SPIFFS_TEST_VISUALISATION=y
# end of Debug Configuration
# end of SPIFFS Configuration

# Name, Type, SubType, Offset, Size, Flags
# Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap
nvs, data, nvs, 0x9000, 0x6000,
phy_init, data, phy, 0xf000, 0x1000,
factory, app, factory, 0x10000, 1M,
storage, data, spiffs, , 1M,

esp_vfs_spiffs_conf_t conf = {
.base_path = "/abc", .partition_label = NULL, .max_files = 4, .format_if_mount_failed = false};