Which module are you using and are everything setup for OTA? which file system format does your USB use? With the error here: [Codebox] err = msc_host_vfs_register(msc_device, msc_host->base_path, &msc_host->mount_config, &vfs_handle); MSC_OTA_CHECK_GOTO(err == ESP_OK, "Failed to register VFS", host...