To split a large file (say test.dat) up into 1MB chunks type bsplit test.dat. This will create the following output files: test.dat-1, test.dat-2, etc. These files can then be saved to individual floppy disks.
To split a file into larger chunks you can use the -m option (1.4MB per chunk), or -s which allows you to specify how many MBs per chunk e.g. -s 10 creates chunks which are each 10MB.
When you are ready to reassemble the files on another computer, use the unbsplit program like this: unbsplit test.dat-1 test.dat-2 .... This will create a file called out.exe. You should then rename this file to the original filename, i.e. test.dat, and you're done.
Download the utility programs here: