SD Card Files

SnapAzule has a microSD slot used for two things:

1. As a pass-through for G-code files the printer reads from (SD-card G-code mode).
2. As a general-purpose storage for files you upload from the web UI.

The SD Card page

From the main configuration page, click SD Card Files →. You land on a table listing everything on the card with upload, download, and delete controls.

Upload

Click Upload File and pick a file from your computer. The progress bar tracks the transfer; when it reaches 100% the page reloads and the file appears in the list.

If the printer is actively printing (detected via Prusa Link), uploads are disabled to avoid corrupting an in-flight read. The button turns grey and the status reads "Upload disabled — Prusa is printing."

Download

Click the ↓ icon next to any file to download it to your computer.

Delete

Click the ✕ icon next to a file. You'll get a browser confirmation dialog — click OK to delete.

Directories show in the list with a trailing / and are display-only; SnapAzule doesn't currently support deleting or creating them from the web UI.

USB mass-storage mode

When connected to a computer via USB, SnapAzule presents itself as a USB mass-storage device: the SD card appears as a removable drive on your desktop. This mode is active any time a USB cable is plugged in and takes over from the serial port.

To get back to serial (for re-flashing), unplug, hold BOOT, and plug in again — the device enters ROM download mode and exposes the serial port.

Capacity and formatting

• SnapAzule expects a FAT32-formatted microSD card.
• Tested with cards up to 32 GB; larger cards should work but are untested.
• Performance is limited by the 1-bit SDMMC mode — uploads top out around 1 MB/s.