My Linux Mint and Windows7 got problem

I'm not sure where the problem came from but recently I'm having problem in using both of my Mint and Windows7. I can't also access my 3rd Hard drive, 1 TB which contain my backup copies of all the important files.

In Mint, the processor seems busy handling something from the moment I logged on to Windows until now, it's been 10 minutes ! I suspected the problem is coming from my 3rd HDD.

I'm scheduling a backup using rsync everyday, my Mint will automatically backup the important folders set from Home to HDD2 and HDD3. Not sure what is wrong, the loading time now is more than the normal.

If I unplugged the HDD3, everything seems okay....