---But the Classic won't ever read a Window$ pc-formatted floppy with a .zip segment of nothing. :-/ If I make a segmented .zip archive and put the segment in different floppies (seems easy), as soon as I put the first floppy onto the Mac, it will claim saying «This is not a Macintosh disk. Do you want to initialize it?»

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Is the destination Mac a Mac Classic or something else? Doesnt a Mac classic have a "Super Drive" that is capable of reading MSDOS formatted 1.44MB floppies? If so, then I think you need the "Apple File Exchange" application (http://en.wikipedia.org/wiki/Apple_File_Exchange) which once run up will recgonise the MSDOS formatted disk and let you copy files from it to your Mac's hard drive (and for things like zip files will perform no translation just do a copy).

Cheers,