External drive formatted NTFS
I have a drive that is formatted Windows NT File System <NTFS> and would like to use it to backup my iMac, running High Sierra. Will I have to re-format the drive <and how do I do that> or can it be used with the HS file system ? Thanks in advance.
iMac (Retina 5K, 27-inch, Late 2014), Other OS, OSX 10.10.1 Yosemite