Saving Tags

Saved tags are Flipper-compatible files written to /mnt/ghostesp/nfc/. You need a PN532, ST25R3916, or Chameleon Ultra build and an SD card with free space.

Steps

1. Scan a tag. Complete the scan so the popup shows results; Save is enabled once data is cached.

2. Tap Save. Select Save in the scan popup. The title changes to “Saving…” and the button disables while GhostESP writes the file.

3. Wait for confirmation. Leave the device alone until it reads “Saved!”. A failed save changes the title (for example, “Save failed”).

4. Repeat as needed. Saved files remain accessible after you leave the scan popup. The filename follows <Model>_<UID>.nfc in /mnt/ghostesp/nfc/, with a few exceptions: DESFire saves as Desfire_<UID>.nfc, EMV as EMV_<UID>.nfc, and PicoPass/iCLASS as picopass_<UID>.picopass.

Chameleon Ultra Saves

• Use the CLI. After finishing chameleon scanhf, stay in the terminal and run chameleon savehf <name>. Files land in /mnt/ghostesp/nfc/.
• Name files clearly. Pick short descriptive filenames without spaces, for example office_door.
• Verify later. Saved Chameleon dumps can be copied to a PC from your SD card exactly like PN532 captures.

Expected result

• Re-open the scan popup and use More to ensure details still match the saved dump.
• Optional: load the .nfc file in a Flipper Zero to confirm compatibility.

Troubleshooting

• Save button disabled. Re-scan the tag and wait for the title to show “NFC Tag”.
• “No SD card” error. Check card seating and filesystem. The path /mnt/ghostesp/ must be writable.
• File overwriting: GhostESP auto-generates names and will overwrite if the same model/UID is scanned repeatedly.

FAQ

• Can I save after removing the tag? Yes. Once the scan completes, the device keeps data in RAM, allowing offline saves.
• What if the tag is MIFARE Classic? GhostESP saves all recovered sectors and keys, so you can reopen the file later without re-running the dictionary attack.