Using Mac OSX external drive as network drive

MARSPATH
MARSPATH used Ask the Experts™
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The attached WD-Mybook-2.pdf shows the WD My Passport'/ TopquarkFiles as external [ to Topquark]. This drive is  Cat5 connected to an Airport Extreme as are the Macs Topquark and Baryon. [why does Disk Utility list Connection as FireWire?]

How can I configure WD My Passport'/ TopquarkFiles as a network disc, available to both Topquark and Baryon?

The network is named HADRON
WD-My-Book-2.pdf
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To clarify.  
You took that screenshot when the MyPassport was connected directly to your computer via USB cable .. isn't this correct?
Both your computers are connected via ethernet cable to an Airport Extreme.

In effect the sharing of the MyPassport HD is controlled on the computer it is connected to .. it has nothing to do with the Airport Extreme

Sharing external usb drives on a Mac is done in the Sharing Preference Pane in the System Preferences
Ensure File Sharing is enabled
Use the + button to add the MyPassport HD or a subfolder on that drive as a new shared folder
Set the users which can read/write that shared folder

From the other computer [Baryon] ... when you connect to the computer [Topquark] with the MyPassport attached you'll see the shared folder as a volume you can connect to
MARSPATHRetired EE/Computers/IT

Author

Commented:
"You took that screenshot when the MyPassport was connected directly to your computer via USB cable .. isn't this correct?"

No, Both computers and the My Passport drive [actually, a WD My Book Live] are connected to the Airport Extreme with CAT5 cable - no USB involved [the My Book Live has no USB connector]. Also, the connection is described as 'FireWire'  by OSX Disc Utility - why?

Starting System Preferences returns 'Preferences Error - There was an error in Sharing preferences'. Starting Preferences a second time works and file sharing and file/printer sharing is read/write for all.

Note that an HP P2055dn laserjet printer, also connected by CAT5 to the Airport Extreme,  is one of the shared devices and is available to all computers/users - including a WiFi connected Windows 8.1 laptop.

My goal, not yet achieved, is to have both OSX computers and connected devices to have r/w access to all resources.
Thanks for clarifying .. you'd mentioned passports and MyBooks etc and it was a bit confusing.

OK .. so when you connect to the Airport Extreme via ethernet then the sharing features of the Airport Extreme cannot be used.

If the My Book Live is connected to the router via ethernet in effect it is completely standalone and neither Mac will control the sharing of folders .. instead you manage the MyBook as a separate device.

Read the MyBook LIVE user manual and you'll see how to use the Dashboard on the MyBook device itself to create users, setup shares etc.
http://www.wdc.com/wdproducts/library/UM/ENG/4779-705058.pdf

The FIREWIRE terminology when you view the drive on the Disk Utility is not relevant .. it is simply because the OSX Disk Utility isn't properly identifying the network attached device MyBook.  
NOTE:
The MyBook LIVEis a network attached device you SHOULD NOT be formatting or attempting to diagnose it via the Apple Disk Utility application as it cannot work properly.  Only use Disk Utility on USB or thunderbolt connected hard drives.
MARSPATHRetired EE/Computers/IT

Author

Commented:
Thanks for your help, now working to create mycloud.com. Upgraded My Book Live to latest firmware and hard at work setting up.

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