How do I copy files from Mac on Windows Partition to Mac Partition? So my mac partition crashed... 

I've tried to repair disk, fsck, reinstall OS - Everything on every list of I could find on Google, and nothing worked.

So I have a back-up of most of my files from the prior week, but I need some other things that were left on the hard drive. 

Fortunately, when I boot up in Windows, the hard drive is fully functional and I can even drag and drop files into my windows partition. I think its worth noting that the files seem alright as I'm able to open them, and even took 1 file from windows on a FAT32 flash drive, and moved it to a mac with no problems. So I want to grab everything that I can from the Windows partition, format and re-install OS.

...so...

I have a 500GB G-Drive, I formatted it to Fat32 and started transferring files, at absurdly slow speeds through USB 2.0, onto it (from windows). 

Now thats finally finished.
The drive won't mount on Mac OS anymore. Any ideas? 

Oh heres some system info if that helps:

On Mac


Mac OS Extended (Journaled)
Format : Mac OS Extended (Journaled)
Owners Enabled : Yes


G-Drive 


Format : MS-DOS (FAT32)
Owners Enabled : No


Windows 7 Home


NTSF
What error do you get?
"The disk you inserted was not readable by this computer", or something else?

Could you please give the output of the command below when pasted in your command window:

syslog | tail | open -ef 


Once before you insert the disk into the USB port and once after.