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Android does not immediately delete thumbnail records. It simply marks that space as "available." If you haven't taken 10,000 new photos since the deletion, the old thumbdata entry persists.
The main issue with .thumbdata files is that they rarely shrink. Over time, as you take, download, and delete photos, the file swells in size. It is common for a single .thumbdata file to consume 2GB to 10GB of internal storage, leaving users desperately searching for a way to view and clear them. Why You Need a Thumbdata Viewer
If you buy a used Android phone or a second-hand SD card, always run a thumbdata viewer on it before using it. You may find sensitive thumbnails left behind by the previous owner. Similarly, if you sell your phone, simply deleting photos is not enough; you must wipe the thumbdata cache or physically destroy the card. thumbdata viewer free
The Ultimate Guide to Thumbdata Viewer Free Tools: How to Recover and View Hidden Thumbnail Files
Here’s what most articles won’t tell you: Android does not immediately delete thumbnail records
The Ultimate Guide to Thumbdata Files: How to Open and View Them for Free
By placing a blank file with that exact name in the directory, Android will be tricked into thinking the thumbnail database already exists. Because it is a blank file and not a folder, the system cannot write new thumbnail data to it, effectively freezing its size at 0 bytes. Summary: The Best Free Tool Checklist Over time, as you take, download, and delete
Standard gallery apps cannot read the database, but advanced file managers with built-in preview binary engines can.
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