To view thumbdata on your phone, you need a powerful file explorer that can read binary data, such as:
If you delete them, Android will simply recreate them the next time you open your Gallery. Forensics: thumbdata viewer free
JPEGs always start with the magic hex bytes FF D8 FF . A free hex editor can locate these markers within the thumbdata file to split and reconstruct the individual images. To view thumbdata on your phone, you need
They don't delete themselves when you delete the original image, leading to wasted storage space. To view thumbdata on your phone
These files act like giant indexed scrapbooks. Even if you delete the original high-resolution photo, a smaller, compressed version often stays indexed inside the thumbdata file indefinitely.