Now, I wish to connect a extra USB printer (ink) to a USB designated port available on the Capsule. What to do to set it up?
Not all printers are supported at the USB port of the Time Capsule or other AirPort routers, and Apple does not provide a list of printers or models that are known to work, so you will simply have to find out for yourself whether or not the printer will work when it is connected to the Time Capsule.
Here's how:
Connect the printer to the USB port on the Time Capsule
Power off and restart the Time Capsule
Restart your Mac
Open System Preferences on your Mac (it is the the "gear" icon on the dock)
Open Printers and Scanners
Click on the small + (plus) button at the bottom of the printer list on the left panel
Another window will open and display the name of your printer.....IF....it is recognized
If it is, click to highlight and select the printer
Click Add
Now try to print a test document, when you bring up the printer dialog, you will see that your printer has actually been installed twice......one location is at your Mac and the other is at the Time Capsule. Select the printer that is connected at the Time Capsule location and see if the document will print.
If the document prints, you are all set. However, only printing is supported at the USB port on the Time Capsule, so if your printer is a multipurpose device.....scan, copy, fax, etc will very likely not be available.