How can I flash zephyr elf to my stm32wb55?

[WStev]

I follow the instructions here:

https://docs.zephyrproject.org/latest/boards/arm/nucleo_wb55rg/doc/nucleowb55rg.html

I've built the .elf file, how do I flash this to my board? I see my board connected as a drive, I copy the elf file over but when I disconnect and reconnect it has disappeared.

I'm on linux.

[Tesla DeLorean]

It likely wants to see a .BIN file, use objcopy or whatever to convert the .ELF to a .BIN