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Many operating systems, file managers and image viewing programs create a thumbnail cache/database to load thumbnails faster.

Some software might also create thumbnails from video (e.g. first frame).

Should you ever lose photos or videos, you might be able to recover a low-resolution version (better than nothing) from a thumbnail cache.

Many operating systems, file managers and image viewing programs create a thumbnail cache/database to load thumbnails faster. Some software might also create thumbnails from video (e.g. first frame). Should you ever lose photos or videos, you might be able to recover a low-resolution version (better than nothing) from a thumbnail cache.

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[–] [deleted] • 1 pt (edited )

Many many of my pictures are of circuit boards and disassembly steps of various things I need to zoom in on to look at fine details.. if they're just low-res thumbnails they're just useless to me. Of the 1,408 photos on my phone right now, 0 are photos of humans.. so no sentimental memory stuff. If a psychologist knew this about me, they'd probably want me committed...