An update to Adobe's Lightroom app for iPhone and iPad has deleted users' photos and presets that were not synced to the cloud, with Adobe confirming that the lost data is not recoverable. The issue was first reported on the Photoshop feedback forums and has since been acknowledged by Adobe, who have released a new version of the app to prevent further data loss. The incident has sparked discussion about the importance of backing up data and the reliability of cloud-based services. Adobe has apologized for the issue, but some users are seeking more substantial action.