You can’t resize an NTFS filesystem with OS X. You’ll need Windows. If you don’t have Windows, you’re only option is to move the data temporarily; you could create an encrypted disk image on a cloud service and use that, in a pinch.
Even if you had Windows, resizing is a risky business. I wouldn’t do it—not with the only copy of your data, certainly. It seems to be a universal truth that your only surviving copy will crash and burn during a repartitioning operation. You should have at least one backup. -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To post to this group, send email to macvisionaries@googlegroups.com. Visit this group at http://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout.