USB not reading

l can’t get my usb to read my png file
Trying to hook direct to the control box via Wi-Fi. However when I put the up address in my search engine it finds my 1F but will not communicate. Any thoughts

the controller only reads .nc, .ngc. and .gcode files.

.png is a picture file. The controller doesn’t see or know what to do with a picture file.

been using carveco to make g code files been working when i load them directly from computer to controller via network

no enternet where machine is located