Hello, I intend to permanently put my A1 mini printer in my garage, where I will not have any option to use Wi-Fi.
So I have tried downloading 3MF files into my SD to use them, except the printer is not capable of reading them.
Where did I go wrong? Should I slice them via Bambu Studio anyway?
3mf is not neccessarily a sliced file. So yes, you’ll need to use the slicer before exporting it to the SD.
In the medium term, you may want to consider adding a TP-link to have WiFi in your garage with the printer.
Tanks for the great tip, however installing WiFi in that room is downright impossible is in another building with its own electrical wiring.
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Ah. That does indeed make a TP-link rather tricky.
Mine worked along a 100m power cable… until I put a fridge on the same circuit 
Best wishes & Happy printing,
Eno