Cannot open a new file in LittleFS subfolders

[dsilletti]

Board

ESP32-WROOM-32E

Device Description

ESP32-WROOM-32E

Hardware Configuration

N/A

Version

latest master (checkout manually)

IDE Name

Arduino IDE 2.0

Operating System

macOS 12.6

Flash frequency

40MHz

PSRAM enabled

no

Upload speed

115200

Description

Cannot open a new file in subfolder, it works with no issues in the root folder

Sketch

File testfile = LittleFS.open("/subfolder/test.txt", "a");
if (testfile) {
  testfile.println("Test");
  testfile.close();
}

Debug Message

N/A

Other Steps to Reproduce

try to open a file in a LittleFS subfolder

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[P-R-O-C-H-Y]

Hi @dsilletti, sorry for later reply. You have 2 options to make it work :)

1. Add true as 3rd parameter to the open function File testfile = LittleFS.open("/subfolder/test.txt", "a", true);. Setting it to true (default is false) will create all dirs (subdirs) to the file. Works with modes write and append.
2. Create the subfolder by LittleFS.mkdir("/subfolder"); and then use File testfile = LittleFS.open("/subfolder/test.txt", "a");

Closing this as solved. Feel free to reopen if needed :)