If you truly need a portable recovery tool (to run from a USB stick on multiple PCs), consider these free, legal, open-source options:

utilizes advanced algorithms to find files missing for longer periods or on corrupted drives. However, deep scans on large drives (e.g., 1TB+) can be time-consuming, sometimes taking over two hours. Compatibility

While the "Quick Scan" finds recently deleted files, the "Deep Scan" digs into the storage device’s sector level to find fragmented and RAW files.