Which way to point this fan inside case?

[Mathew_6]

The case has 2 120mm fans in the front blowing into the case.
The top intake fan has no obstruction.
The lower intake fan is blowing through a 3x3.5" bay with 2 HDD's installed.

In the rear there is a 120mm fan blowing out and up, and one on the back side of the case blowing out.

These 4 fans are cooler master s12 silent fans, all 120mm.

I have a fifth fan that I want to install in the bottom, but I am not sure which direction it should blow.
There are 2 HDD's installed in that lower bay, also a 3x3.5" bay.
There is a significant heat problem with these drives when I have the PC on for a sustained time. Even if they are idle I am getting 45+ degree C readings from SpeedFan with these 2 lower drives.

I am guessing that the fan needs to blow away from this lower HD bay, and in the direction of the power supply.
But I just want to make sure.

This fifth fan is a different type, Antec TriCool. A bonus question: With this fan being in the lower area, should it be set to Low, Med, or High?

Thank you.

 

[CountMike]

That bottom one should blow toward lower disk bay. PSU has own ventilation and needs no help. Low, Med, or High would depend on what you have in that lower HDD bay.

 

[Mathew_6]

That bottom one should blow toward lower disk bay. PSU has own ventilation and needs no help. Low, Med, or High would depend on what you have in that lower HDD bay.

Hi, thanks for the reply.
There are 2 HDD's in the lower bay. With any sustained power on-time, these disks get too hot for comfort, nearing 50 degrees C consistantly

 

[CountMike]

That's why that fan should be pointed to that tray, it's too closed up.