How to change external hard drive sharing and permissions

I have two new hard drive that are formatted NTFS. The sharing and permissions is et to ready only so I can only read the drives I can't edit any files on these two drives.
Both drives are connected via USB to my iMac running OS X 10.9.5
I have other drives on my network that under sharing and permission I have  'Custom Access' for file sharing. Both these drive are NTFS format.
How can I change the other two drive sharing and permission settings to 'Custom Access'
Thanks

There is no permissions you can change. OS X can only read from an NTFS formatted drive. If you need to read from and write to an NTFS formatted drive you will need to use a utility such as Tuxera NTFS 2012.3.4. Alternatively, re-partition and reformat the drive for a Mac.
Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Steps 4-6 are optional but should be used on a drive that has never been formatted before, if the format type is not Mac OS Extended, if the partition scheme has been changed, or if a different operating system (not OS X) has been installed on the drive.

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