http://macntfs-3g.blogspot.com/
if you don't plan to use the drive with windows I strongly recommend reformatting it mac os extended.
NTFS-3G is a stable, full-featured, read/write NTFS driver for Linux, Android, macOS, Mac OS X, FreeBSD, NetBSD, OpenSolaris, QNX, Haiku, and other operating systems. It provides safe handling of the Windows XP, Windows Server 2003, Windows 2000, Windows Vista, Windows Server 2008, Windows 7, Windows 8 and Windows 10 NTFS file systems. The development of NTFS-3G for Mac OS X is funded by Tuxera Ltd. Many of you have probably noticed that we now have a commercially supported counterpart to NTFS-3G, Tuxera NTFS for Mac. Tuxera NTFS for Mac builds on the reliable NTFS-3G code base, but has several premium enhancements. UPD: There is even better way to solve the same issue with native Mac OS X drivers, but it has its own pros and cons. Read at the end for details. UPD (IMPORTANT): Native driver makes NTFS unusable. Read below for details. Mac OS X Lion (10.7) was released recently, in the end of July 2011. And many users had started to complain that their NTFS disks stopped working.


Apr 11, 2009 4:50 PM
Ntfs-3g For Mac Os X 10.12.5
OSX itself can indeed only read from NTFS formated disks, not write to them.
Only through installing NTFS-3G or the commercial Paragons NTFS for Mac OSX gets write access to NTFS.
While there is a way to convert FAT32 to NTFS there is no way for the other direction apart from reformating the disk.
But for 'uploading' the music files you have on that disk you only need read access not write access.
Or do you plan to leave the files on the disk and not put them into the iTunes library ?
Regards
Stefan