There is no inherent limit to how nested the folders may be.
I tried your data and it seemed to work fine for me generating over 3000 lines of output. Could you have a line ending issue? If you are running the script on *nix, but the file is generated on Windows then the line ends generated (cr/lf) won't match those expected (lf).
I notice that some of the names have / characters in them (Folder 7969 for example). That is likely to cause you grief if you use the names as folder names.
It looks to me like you really need a database solution to this problem instead of a file based solution.
True laziness is hard work
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