ok, so Im moving from windows, with NTFS.

I have backed all my data up to NTFS usb external drive (required for 4gb+ files)

I need to get my dat OFF this drive, onto my mac OS data drive

currently its READ only in OSX.

I want to copy it to my OSX drive BUT i want to keep a copy on my usb drive in case I find in the future the transfer was corrupt.

The problem comes when I want to backup to the USB drive along side my ntfs backup, I cant write to it with Time machine, LaCie, super Duper.

What is the wrokaround? Can I use my windows App to shrink the ntfs and install a new partion to backup to? will OSX backups mind this?

I dont want to delete my drive and handover the whole usb drive to Time machine etc.