Utah and other fusion centers are just the ones we know about.
Who's to say, for example, a facility like that which is under DIA doesn't have vast digital storage equipment.
Many possibilities.
Granted this story is notable.
But,
Why in the hell would I believe ONE WORD Bob Woodward has to say?
I get the strategy-move of allowing Woodward some sort of access to POTUS and administration players.
To say it another way:
Whatever Woodward quotes is suspect.
And I count on there being moar to the subject quoted than what & how Woodward portrays it.
Don't forget our military has been doing intense tunnel warfare training for the last few years.