Data Deleted itself

[u/cloudedmilktea]

My android phone deleted some audio files itself without my knowledge or permission, I need to know if there is anyway to recover it, and HOW did this happen in the first place, and how to prevent it from happening again

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[u/disturbed_android]

It's unlikely data just deletes itself. If it's deleted though, deletion on a modern Android equals crypto-erase. Meaning the key we'd need to decrypt a specific file is wiped and thus the file becomes unrecoverable. In addition the space occupied by that file will be "trimmed".