We have one file server, after reading the (faa) approval of the IFIS-5000 it say's:
operators with optional Electronic charts (E-charts) must have a back-up chart available to the flight crew.
The question actually is if we have a class 1 EFB if this would be sufficient as a back-up chart system. (for approach and airport plates, we would still have jeppesten part 1 and airway charts in paper)
PD