What's the final word on having an SD slot? Hubsan com doesn't mention it, Hubsan Official on Aliexpress says it has it:
MicroSD Card, U3 or Class10 above
16G/32G/64G/128G
These are maybe the options
Yes - for normal flight recording
Yes - for firmware only or some kind of after flight download to SD
No
Yes but the SD card puts it over 250g