If your speakers have uploaded their user resources to their profile (as opposed to their session), you as an Admin have the ability to export all the files into a .zip file.
This is particularly helpful, for example, if you are trying to download all speaker headshots in one, quick action.
Downloading User Resources in Bulk
From the Admin portal, click on Event > Resources:
Click on the Speaker Resources tab. From there, you can view all your Speaker Resources. Click the Select All button to choose all the files in the table:
Next, click the Download Selected button in the top right corner. After that, a .zip file called UserResources will be downloaded to your device.