Why did my phone reset itself?

[Android Central Question]

I lost all my pictures of the birth of my grandson and my youngest daughter's Graduation. Very sad want them back. Why did it happen? How do I retrieve lost pictures?

 

[belodion]

Phones sometimes do reset themselves. Without backups, there's very little that you can do, alas.
https://forums.androidcentral.com/showthread.php?t=967867

If they were backed up to Cloud storage, set up the phone again - or perhaps use another - and sign into your device account.

 

[B. Diddy]

Welcome to Android Central! Which phone? Are you certain it did a full factory reset on its own?

Using a file manager app, go to the /DCIM/Camera directory (assuming the missing photos were taken using your Camera app). Do you see any of the photo files there?

In the future, take advantage of Google Photos auto-backup: https://support.google.com/photos/answer/6193313?co=GENIE.Platform=Android&hl=en