I suppose what you could actually do is partition the external drive(i.e. format half for mac file system and leave half in NTFS) and then just transfer them from one partition to the other.
Of course you’ll need partitioning software to do that iPartition should do the trick: http://www.versiontracker.com/dyn/moreinfo/macosx/23828
Then what? Have 2 partitions and 2 copies of all the data indefinitely?
OP, you may as well just do the transfer. You could theoretically resize the disk and make it smaller, make a new FAT32 partition, copy the data over, and resize again, but one disk copies are much slower than disk-to-disk. So just do it. You won’t noticeably degrade the life of your internal drive.[/quote]
I think I know what you’re saying, but lemme confirm: Throw the data onto my mac hard drive, reformat the external, put the data back on it? Thanks for the advice.