After getting really frustrated by the being unable to transfer a file that I had just transferred and printed the day before and then not being able to print that file from the USB either with no kind of message back. I did a error log dump got a FW_0.log file that contained no useful data. Gave up and starting printing with my new resin printer (messier but less problematic) and eventually came back to this. Tried reprinting local files and smaller files to see if I could get anything to work without any luck.
For grins and giggles, I tried another error log dump to see if I got anything different. This time there was a FW_0.log and a SW_0.log file.
The SW_0.log file contained this usual bit of info:
1647987859722,2022.03.22 22:24:19.722,DEBUG,SC,Start copy file into workspace…
1647987861807,2022.03.22 22:24:21.807,ERROR,SC,java.io.IOException: write failed: ENOSPC (No space left on device)
1647987861813,2022.03.22 22:24:21.813,ERROR,SC,java.io.IOException: write failed: ENOSPC (No space left on device)
1647987861815,2022.03.22 22:24:21.815,ERROR,SC, at libcore.io.IoBridge.write(IoBridge.java:501)
So apparently when the internal storage on the touchpad gets too full it will quietly fail to print or transfer anything, even stuff that’s already stored locally. And in typical Snapmaker fashion it won’t put anything useful back to the screen or Luban.