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<blockquote data-quote="cwa107" data-source="post: 1070616" data-attributes="member: 24098">That's because it's formatted in the NTFS filesystem, which is native to Windows.&nbsp; Mac OS X can READ NTFS drives, but can not write to them.Your options are as follows:1.&nbsp; Format the drive in the Mac's native filesystem (HFS+), this is done in Disk Utility (Applications =&gt; Utilities).&nbsp; But bear in mind that this will make it incompatible with Windows, without a third-party driver.2.&nbsp; Use a 3rd party filesystem drive for the Mac.&nbsp; NTFS-3G for Mac OS X is free, but some say it is unstable.&nbsp; I recommend Paragon's $30 NTFS for Mac OS X.&nbsp; Another option that chscag alluded to is to use OS X 10.6's native NTFS R/W driver, but that is still sort of in development and is not officially supported.&nbsp; If you Google NTFS Mac OS X 10.6, you should find tutorials to turn it on, but I wouldn't recommend it at the moment.3.&nbsp; Format the drive in FAT32.&nbsp; FAT32 is an older filesystem, but is still useful for cross-platform compatibility.&nbsp; It has some limitations but works with both Windows and Mac OS X.&nbsp; The biggest problem is that Windows imposes a 32GB limit on partition sizes for FAT32... So, in that case, you'll need to format the drive under OS X in order to get a full 2TB volume.</blockquote>

[QUOTE="cwa107, post: 1070616, member: 24098"] That's because it's formatted in the NTFS filesystem, which is native to Windows. Mac OS X can READ NTFS drives, but can not write to them. Your options are as follows: 1. Format the drive in the Mac's native filesystem (HFS+), this is done in Disk Utility (Applications => Utilities). But bear in mind that this will make it incompatible with Windows, without a third-party driver. 2. Use a 3rd party filesystem drive for the Mac. NTFS-3G for Mac OS X is free, but some say it is unstable. I recommend Paragon's $30 NTFS for Mac OS X. Another option that chscag alluded to is to use OS X 10.6's native NTFS R/W driver, but that is still sort of in development and is not officially supported. If you Google NTFS Mac OS X 10.6, you should find tutorials to turn it on, but I wouldn't recommend it at the moment. 3. Format the drive in FAT32. FAT32 is an older filesystem, but is still useful for cross-platform compatibility. It has some limitations but works with both Windows and Mac OS X. The biggest problem is that Windows imposes a 32GB limit on partition sizes for FAT32... So, in that case, you'll need to format the drive under OS X in order to get a full 2TB volume. [/QUOTE]

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