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I've just noticed that a file I downloaded and can't copy onto my MicroSD card is not due to lack of space on the card, but due to the fact the file is a bit larger than 4GB.

I don't want to change the filesystem on the card to extFAT because I doubt that all of my devices including cameras will work with that fs.

Is there a tool designed to chunk files into 4 gig pieces to work around this very problem?

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    If you're prepared to install Cygwin, you could use split. – CPerkins May 17 '16 at 13:48
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    True but I'm looking for a simple-to-install / simple-to-use tool. Work won't like it if I install Cygwin though they don't mind me downloading stuff at work to take home on a USB/SD. – hippietrail May 17 '16 at 14:10
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    Understood. Hope you get a solution. – CPerkins May 17 '16 at 14:54
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You can use 7-zip, WinRAR or WinZIP to create a non-compressed file. This is very fast and universal solution, you can open a zip file on any platform later.

7-zip

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  • Sorry, it's not quite clear "a file" - do you mean "a series of files"? – hippietrail May 17 '16 at 14:59
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    @hippietrail what Michal describes will split the file into multiple parts, i.e. make create multi-volume zip (file.z01, file.z01 etc.) In the marked box you can define the maximum size each "volume" shall have. – Izzy May 17 '16 at 15:37
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It is a very old tool, but it was designed to solve exactly this problem. Splitter-Light is a portable app (only 55KB), what means that you can run it without installation from the sd card.

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