This article explains how to recover an unsaved PowerPoint. These instructions apply to PowerPoint 2019, 2016, 2013, and Microsoft 365.
Quick PowerPoint Tip: Recover Unsaved Presentations
There are a few ways to recover an unsaved PowerPoint. If one method doesn't work, you should try the other options below.
PowerPoint has a feature called AutoRecover that periodically saves data from your presentations. In newer versions of PowerPoint, you can open AutoRecover files from within PowerPoint:
Select “Recover Unsaved Presentations” at the bottom of the list of recent files.