Will this DIY NAS work?

[One]

There's no room in my HTPC for more HDDs. I've decided a NAS is probably the better route anyway, allowing me to access my media from any room using the fire tv stick for example.

Now some NASs look nice, all enclosed etc but they're expensive and can be noisy so I've been trying to spec my own. All i need to do is have drives show up on the network and they only need to be as fast as needed to stream video. I've read that USB2.0 is quick enough for the highest quality blu-ray material. 4k maybe not but if I can't justify a couple hundred on a NAS then I sure as can't justify a 4k tv yet

So here's my plan:

I use the Raspberry Pi as the controller

Then the hard drives plugged in using this

With the data usb into the pi and the power usb into one of these

Also hack together some sort of case.

The only thing I'm concerned about is powering the HDDs via USB. That particular hub will spit out 5V at 2.4A.

Is this likely to work?

 

[One]

I thought it would just be a fun little project that also had potential to double up as a usable NAS. However I don't want to even try if it's not going to work. Do you have any idea of max transfer speeds for the Pi?

 

[One]

Cool. Well I found the rpi for £20 so I'm going to give that a go first. If it turns out to be too slow then I can upgrade to the banana or go down the microserver route.