You need to move data off the drive, reformat it as you choose, then move data back.is it possible to do such conversion?
if so, how?
No, you can't reformat the drive without destroying data stored on it. Why do you need a different format?thats the only choice?
There's no possibility like when going fat -> ntfs,
to leave data on disk?
i have two 1TB disks but both are loaded with too much data
You can read NTFS drives from Mac OS X. If you want to read/write to NTFS from Mac OS X, you can use Paragon, as an alternative to changing the format.i have both in ntfs format as i used only a pc, but now only using mac
also i have those disks plugged to a router, using them as NFS and it would be better to be ext3 at the moment