Try USB Data Recovery: Lost Files, by Stephen Kingston, a mobile tool for rescuing deleted files from external USB media. It scans attached USB flash drives, SSDs and SD cards over OTG, reading NTFS, exFAT, FAT32, APFS and HFS+ to locate recoverable photos, videos and documents. Features quick-scan that preserves filenames and folders, read-only processing to avoid writes, and local processing with no network transmission or activity. Designed for Android users handling cross-platform or unreadable drives, offering private, on-device recovery without root access.

How the app reads and recovers files from unreadable drives

Connect a USB drive via USB-C or an OTG adapter and the app performs on-device parsing of the attached media. The tool includes engines for NTFS, exFAT, FAT32, APFS and HFS+, so it can inspect Windows and Mac volumes that some file managers report as RAW or empty. Quick-scan mode reads filesystem records to recover original filenames and folder structure when those metadata remain intact, and the app exposes previews before any recovery step.

Does it slow down your device during a scan?

All processing happens locally on the phone, which means the device handles signature reads and filesystem parsing without sending data over the network. Scan duration and system load vary with drive capacity and selected scan depth; quick scans examine filesystem tables while deeper modes read sectors. Because the phone performs active reads from the external media, CPU and memory usage rise during scans and completion time depends on drive condition.

Is it safe to run on production or sensitive media?

The app enforces a read-only scanning model at multiple layers, preventing writes to the source drive while inspecting contents. It allows previews of found files before committing to recovery and processes all data locally with no external transmission. The developer designed the workflow to avoid modifying attached media, which reduces the risk of accidental alteration during investigation, and the no-root requirement avoids elevated system changes on the phone itself.

Do I need technical knowledge to operate USB Data Recovery?

Basic hardware steps are required: attach the external drive using a USB-C or OTG adapter and select quick or deeper scan modes. No root access is necessary, which simplifies setup for most Android users. The interface is reported as straightforward and offers file previews, but successful restoration still depends on the physical state of the media and whether deleted sectors have been overwritten, a condition outside the app's control.

Practical on-device recovery with a clear trade-off

USB Data Recovery: Lost Files is a practical option for Android users who need direct, private recovery from external drives; it inspects media without modifying the source. The key limitation is that recovery success depends on whether deleted data has been overwritten on the physical device. For best results, run an immediate scan after data loss and avoid any writes to the affected drive until recovery finishes.