Blog
How to find what is surplus on your disk, and above all, what is better left alone.
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25 August 2026
Folders you should never scan for duplicates
Some folders are full of identical files on purpose, and removing them breaks the program that put them there. The list, and the one folder browsers block outright.
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25 August 2026
Why WhatsApp turns one photo into five files
The one you sent, the one they got, the one they forwarded back. Why no fingerprint will ever connect them, and which copy is worth keeping.
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25 August 2026
Duplicates on your phone: why it is harder than on a computer
More duplicates, fewer tools. What Android allows, why iPhone analyses but will not move, and where those limits actually come from.
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24 August 2026
Screenshots of your photos: why duplicate finders miss them
The same picture, matching 66%. What half an image of black bands does to the comparison, why trimming them naively makes it worse, and the eight ways a phone frames a photo.
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21 August 2026
Exact duplicates and visual duplicates: what each one actually means
One kind can be cleared without looking and the other cannot. How a fingerprint proves two files are identical, how appearance gets measured, and the failure that ruins duplicate finders.
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20 August 2026
Why you have three copies of the same video and how they got there
One minute of phone video weighs what four hundred photos weigh. The five routes a video takes to multiply, why the forwarded copy is a different file, and which one to keep.
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20 August 2026
How to find duplicate files without installing anything
Between 30 and 50% of your documents and photos are copies, according to Microsoft. Why searching by name fails, how they are actually found, and the list of folders you should never touch.