Zend certified PHP/Magento developer

What is the autosave powerpoint file extension

Following a windows PC crash, when asked if I wanted to save an autosave powerpoint presentation, I accidentally clicked no.

All my work was lost and the autorecover folder C:Users<user>AppDataRoamingMicrosoftPowerPoint was empty.

The fact that it was there after the PC crash means it must be saved somewhere. But where and what file extension?

I’m using file recovery software and can recover deleted files etc. but cannot find the deleted file anywhere, it certainly is not obvious e.g. *.ppt. The closest I came was a version from the same day but it only has 165 bytes and starts with ~$.

Does anyone know where Powerpoint saves the autosave file when a PC crashes?