If you’re using iOS 11 or later, then you have the power to upload multiple files! Keep in mind, this is possible on iPads only.
Uploading Multiple Files
While in the Showbie app, swipe up from the bottom to bring up other app options
Tap on the app that you’d like to upload files from
Tap and hold on the first file you’d like to upload
While holding on the first file, tap on any other files to upload
Swipe up from the bottom of the screen to bring up app options and open Showbie
Drop the files to start uploading
Make Uploading even greater
This is also possible in split-screen! To start split-screen, swipe up again to show other app options and tap and hold on the app you’d like to use and drop it on the left or right side of your screen.