I have downloaded the Checklist Editor 2.30 and produced a set of Checklists for my GTN 750 txi.
Saved it to a newly formatted SD card, onto the root directory. There are no other files on the card.
Inserted card in GTN, Master ON, Avionics Master ON. No recognition of the card by the GTN. No options in System Menu to upload card (Checklist.ace file).
What else does this procedure need for me to get the Checklist operating?