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I apologise that I cannot provide any source other than mentioning a quote from my friend. (This is almost a question for skeptics.stackexchange) He said there is a protocol because of which copying a zipped file into a pen drive is faster than copying the file unzipped, even if is 1MB in size.
He couldn't back it up, and I couldn't find any such protocol online. But since he said he read it somewhere, I just thought I'd ask here. If this question is inappropriate, please let me know in the comments and I'll delete it.
Update: The claim is that if the file size after zipping is 1MB and there is another unzipped file of size 1MB, the zipped file will get copied faster just because its a zipped file.
If we could write "zipped" files faster, then what would stop us from writing "unzipped" files as if they were "zipped"? Data is just data... at this point nothing knows what the data represents (e.g: ZIP archive vs. image) – Attie – 2018-09-10T17:21:31.210