Proclaim users have been asking for the ability to move presentations around using a thumb drive for a long time and with the latest update it's finally possible.
Use the option in the New Presentation menu to backup the currently open presentation.

This generates a single .prs file which contains all your presentation data and the media required for both 4:3 and 16:9 aspect ratios. When you want to restore from a backup use the New Presentation menu option shown below.

Restoring a backup creates a new copy of the backed up presentation. This presentation will be synced as a separate presentation from the original.
Using the built-in sync framework to move presentations around and collaborate with your team is still the preferred approach but we hope these backups will provide peace of mind and be helpful for those dealing with spotty or non-existent internet connections in some locations.
As always, let us know what you think!