

Depending on the setup and types of reads and writes, performance ranges from 0.5 to 17.5 MB/s for writing and 1.9 to 25.6 MB/s for reading. This is due to the processor speed on the AirPort Extreme. The performance of USB hard drives attached to an AirPort Extreme is slower than if the drive were connected directly to a computer. Users may also connect a USB hub and printer.
AIRPORT UTILITY PC FOR MAC OS X
The AirPort Disk feature allows users to plug a USB hard drive into the AirPort Extreme for use as a network-attached storage (NAS) device for Mac OS X and Microsoft Windows clients.

The 2013 802.11ac model was re-packaged into a more vertical case, taller than it is square. From 2007 to 2013 the Extreme was packaged in a rounded-rectangle white plastic housing, similar in layout and size to the Mac mini or earlier Apple TVs. The earliest models were packaged similar to the original AirPort Base Station, in a round housing known as the "flying saucer". The AirPort Extreme has gone through three distinct physical forms.
AIRPORT UTILITY PC UPGRADE
In 2013, a major upgrade added 802.11ac support and more internal antennas. Several minor upgrades followed, mostly to change antenna and power in the Wi-Fi. With the addition of the even faster Draft-N standards in early 2009 this naming was dropped, and from then on only the gateway has been known as the AirPort Extreme. At that time the gateway part of this lineup was known as the AirPort Extreme Base Station. The name "AirPort Extreme" originally referred to any one of Apple's AirPort products that implemented the (then) newly introduced 802.11g Wi-Fi standard, differentiating it from earlier devices that ran the slower 802.11a and b standards.
