I did notice next error (No Dataflash inserted) with my 3DR APM2.5.2 when loading an Arducopter firmware.
I did reset and erase the APM multiple times, same error. It looks to respond to all testing, but not sure if is safe to fly with this APM.
When I load an Arduplane FW, I do not see that error (see below right side). Loading again the Arducopter, the error is shown again (left side).
What could be the cause, what means and if I can fly safe?