The best way to export files from TrialPad to ExhibitsPad is to export the files directly to a USB drive. You can then connect the USB drive to another iPad and import those files into ExhibitsPad. Please see the relevant support article called “How do I connect a USB drive or an SD card to my iPad to transfer files?”
Because you will want the files to be easily searchable in ExhibitsPad you may want the file names to include the exhibit numbers. This can be done using the Export by Exhibit # option in TrialPad. Please see the relevant support article called “How do I export files using the exhibit numbers as the file names?”