File-forwarding capacity is the maximum rate per minute at which each Palo Alto Networks firewall model can submit files to the WildFire® cloud or to a WildFire appliance for analysis. If the firewall reaches the per-minute limit, it queues any remaining samples.

The Reserved Drive Space in the following table represents the amount of drive space on the firewall that is reserved for queuing files. If the firewall reaches the drive space limit, it cancels forwarding of new files to WildFire until more space in the queue is available.