Any way to access orphan files? | Data recovery after “Clear Data” (Samsung S7 FE) – Infinity Painter app projects (Android 11, Non-Root)

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Summary

This incident centers on the irreversible loss of Infinity Painter project files after a user tapped “Clear Data” instead of “Clear Cache” on a Samsung Galaxy Tab S7 FE running Android 11+. The action wiped the app’s private storage, and due to Scoped Storage, non‑rooted devices, and allowBackup=”false”, no logical or physical backup path remained available.

Root Cause

The failure was caused by a combination of Android platform constraints and app‑level configuration:

  • “Clear Data” fully deletes the app’s private directory (/data/data/com.brakefield.painter/ and /Android/data/com.brakefield.painter/).
  • Scoped Storage (Android 11+) prevents user‑level or ADB access to app data directories.
  • allowBackup=”false” blocks ADB logical backups, resulting in a 1 KB .ab file.
  • Samsung Smart Switch does not extract private app data for apps that opt out of backup.
  • Non‑rooted, locked‑bootloader Samsung devices cannot expose block devices for imaging or forensic carving.
  • No physical imaging mode (e.g., EDL, Odin) exposes the userdata partition on modern Samsung devices.

Key takeaway: Once “Clear Data” is pressed on a non‑rooted Android 11+ device, the app’s private data is deleted and cannot be recovered using consumer‑accessible methods.

Why This Happens in Real Systems

This failure mode is extremely common because modern Android security is designed to prevent exactly the kind of access required for data recovery.

Typical contributing factors:

  • Scoped Storage isolates app data to protect privacy.
  • OEMs lock bootloaders to preserve device integrity and DRM.
  • Apps disable backups to protect intellectual property or user privacy.
  • No block‑level access is exposed over USB on consumer devices.
  • MTP is not a filesystem protocol, so tools like PhotoRec cannot operate.

In other words, the system is working as intended—even though it feels catastrophic to the user.

Real-World Impact

When this failure occurs, users typically experience:

  • Permanent loss of years of creative work (drawings, notes, projects).
  • Inability to use forensic tools due to lack of block‑level access.
  • False hope from logical backup tools that silently produce empty archives.
  • Misleading empty folders when browsing /Android/data/ via MTP.
  • No recovery path unless the device was rooted before the incident.

For creative professionals, this can mean:

  • Loss of client work
  • Loss of portfolio pieces
  • Loss of long‑term personal projects

Example or Code (if necessary and relevant)

Below is an example of the ADB backup command that fails due to allowBackup="false":

adb backup -f rescue.ab -noapk com.brakefield.painter

This produces a 1 KB file because the app explicitly opts out of Android’s backup system.

How Senior Engineers Fix It

Experienced engineers recognize that post‑incident recovery is impossible, so they focus on prevention and architecture:

  • Implement app‑level export features (auto‑export to shared storage or cloud).
  • Use SAF (Storage Access Framework) to store user‑generated content in user‑accessible directories.
  • Avoid allowBackup=”false” for apps that handle irreplaceable user data.
  • Provide built‑in versioning and cloud sync.
  • Educate users about the difference between “Clear Cache” and “Clear Data”.
  • Design for disaster recovery, not after‑the‑fact forensics.

For end users, the only reliable mitigation is:

  • Regular manual exports to shared storage or cloud services.

Why Juniors Miss It

Less experienced engineers often misunderstand how Android storage works:

  • They assume ADB backup always works.
  • They believe MTP exposes the filesystem, when it only exposes a virtual file layer.
  • They think forensic tools can scan the device, not realizing block devices are inaccessible.
  • They underestimate the impact of allowBackup=”false”.
  • They assume Smart Switch backs up everything, which it does not.
  • They do not realize that “Clear Data” is equivalent to deleting the app’s entire private directory.

The core misconception: Juniors expect Android to behave like a desktop OS, but Android is a security‑first, sandboxed environment where data recovery is intentionally impossible.

If you want, I can also help you draft a user‑friendly warning, a developer‑focused best‑practices guide, or a risk‑mitigation checklist for creative apps on Android.

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