Slow BOOT High Sierra after updating

HEllo,

my MacBook Pro (13-inch, Mid 2012) is so slow in boot process after the HighSierra update.

When in verbose mode, it stop on :

"pic pause: SDXC"

and after a "good minute" the following row says :

"er_state_obj_get_for_recoverry:3682: No ER state object - rolling is not happening - nothing to recovery"

Some clue to resolve the problem ?

Same OS with another MAC(MacbookPro MID 2010) work without problem.

A.