[John Kotarski]

Here is a fix that worked for me:

The drives need to be formatted as ‘Mac OS Extended (journaled)’ and the partition map scheme is ‘GUID Partition table’.

This can easily be done using the ‘Disk Utility’ accessible from the finder. Once in Disk Utility, select the drive and then select the partition tab. From there, select ‘1 partition’ and under options ‘GUID Partition table’, then ‘Mac OS Extended (journaled)’. After this is complete close window. Select the drive icon and right click to get info. It should show your permission to read/write the drive.