Reasons that Cause Corruption in Photoshop files
Improperly installed third party add one that can have bugs.
Applications running in the background while saving a psd file
Accidentally changing the format
How to Recover PSD files
1. Recovering from autosave: Turn on the autosave feature on the photoshop tool to get rid of unsaved files. As you continue to work, this feature enables saving files periodically as you continue to work on it.
2. Recovery from temporary files: The temporary files used by adobe to save your work in progress or changes you do in your files. You will have to remember the name of your original file to recover the work from temporary files.
3. Data recovery professional: Nothing can be better than an appropriate approach and tools that a professional offers to recover your precious PSD files corrupted. With a special approach, there will be more chances of recovery of your corrupted psd files.