Slow connection: usb hub connected to external hd transfer songs to iphone

[1rottenapple]

the setup: Macbook air with media (itunes library) stored on external hd, in order to sync with iphone and shuffle​

CONNECTION 1 speed is FINE when: macbook air+external hd connected to airport extreme N router+iphone=TRANSFERS ARE FAST, NO PROBLEM

CONNECTION 2 Speed STINKS! when: macbook air+external hd connected to usb hub+iphone=TRANSFERS ARE SLOW This means the iphone and external hd with the itunes library are both connected to the usb hub.

on connection 2, the hub is connected to the single usb drive, and the external hd and the iphone are connected to the hub. It takes about 10 seconds to transfer one regular 3min songs while it takes a second to transfer via airport n router with the iphone connected to the air's single usb hub.

The hub is a idotconnect 4 port usb hub. What can the issue be? Is it because the HUB transfering data directly to the device (external hd to iphone on the Hub)?

I would like to transfer songs without the option so I am trying to ruleout the hub as the issue, or maybe external hd plus an iphone connected on a hub together are supposed to be that slow?

 

[1rottenapple]

I am syncing with the iphone via airport extreme connected to the external and the Iphone on the Air's usb... Again, fast syncing.

 

[iToaster]

What's happening is that you're using a lot of the single USB port's bandwidth. Essentially, you're distributing that 480 Mbps (we all know it's a lot slower than that, but bear with me) across two devices, essentially giving each 240 Mbps. It's faster to transfer over AirPort because your aren't shoving everything through one port.