SD tool

Live: https://sdtool.tyng.app/
Source: standalone-tools/sd-tool-standalone/

TŒRN does not expose the microSD as USB mass storage. While Menu → ETC → SD is open, firmware runs a USB serial file server (toern_sd_serial.ino). The SD tool is the host client.

Browser (Web Serial)

1. Device: Menu → ETC → SD (WAIT → OK when connected)
2. Computer: Chrome or Edge desktop → open the site → Connect
3. Stay on ETC → SD for the whole session

Features: browse, upload, download, rename, delete; multi-file / folder drops; ZIP extract in-browser; WAV → 44.1 kHz mono 16-bit on upload.

Caveats: Android Chrome usually cannot see the Teensy port. Opening serial can reboot the Teensy — re-enter ETC → SD if needed.

See also firmware notes: SD & storage.

Python CLI / local web

cd standalone-tools/sd-tool-standalone
pip install pyserial
python3 toern_sd.py ports
python3 toern_sd.py -p /dev/cu.usbmodemXXXX list /
python3 toern_sd.py -p /dev/cu.usbmodemXXXX put ./kick.wav /samples/kick.wav
python3 toern_sd.py web   # optional UI at http://127.0.0.1:8787

Requires a USB type that includes Serial.

Code map

File	Role
index.html / styles.css	Hosted Web Serial UI
explorer.html	UI used by local web mode
toern_sd.py	CLI + local server; ACK-framed GET / PUT / list / mkdir / rm

Firmware side: toern_sd_serial.ino, enabled from loop() when the ETC → SD menu page is active.