▁Net B SD . ▁ ▁Air Port ▁Disk ▁The ▁Air Port ▁Disk ▁feature ▁allows ▁users ▁to ▁plug ▁a ▁USB ▁hard ▁drive ▁into ▁the ▁Air Port ▁Ext reme ▁for ▁use ▁as ▁a ▁network - att ached ▁storage ▁( N AS ) ▁device ▁for ▁Mac ▁OS ▁X ▁and ▁Microsoft ▁Windows ▁clients . ▁Users ▁may ▁also ▁connect ▁a ▁USB ▁hub ▁and ▁printer . ▁The ▁performance ▁of ▁USB ▁hard ▁drives ▁attached ▁to ▁an ▁Air Port ▁Ext reme ▁is ▁slower ▁than ▁if ▁the ▁drive ▁were ▁connected ▁directly ▁to ▁a ▁computer . ▁This ▁is ▁due ▁to ▁the ▁processor ▁speed ▁on ▁the ▁Air Port ▁Ext reme . ▁Depending ▁on ▁the ▁setup ▁and ▁types ▁of ▁reads ▁and ▁writes , ▁performance ▁ranges ▁from ▁ 0 . 5 ▁to ▁ 1 7 . 5 ▁MB / s ▁for ▁writing ▁and ▁ 1 . 9 ▁to ▁ 2 5 . 6 ▁MB / s ▁for ▁reading . ▁Performance ▁for ▁the ▁same ▁disk ▁connected ▁directly ▁to ▁a ▁computer ▁would ▁be ▁ 6 . 6 ▁to ▁ 3 1 . 6 ▁MB / s ▁for ▁writing ▁and ▁ 7 . 1 ▁to ▁ 3 7 . 2 ▁MB / s ▁for ▁reading . ▁N TF S - form atted ▁drives ▁are ▁not ▁supported . ▁ ▁Air Port ▁Ext reme ▁models ▁by ▁generation ▁ ▁Original ▁generation ▁The ▁original ▁Air Port ▁Ext reme ▁Base ▁Station ▁was ▁so ▁named ▁because ▁of ▁its ▁support ▁for ▁the ▁ 8 0 2 . 1 1 g ▁standard ▁of ▁the ▁day , ▁as ▁well ▁as ▁for ▁its ▁ability ▁to ▁serve ▁up ▁to ▁