500gb passport HDD not recognized in MOJO

I bought a 500gb WD My Passport drive recently, and it works fine in Windows, but I cannot get it to show up in MOJO. It was NTFS, so I tried changing to FAT32, and it's still not showing up, despite my 32gb Micro SD card being FAT32 and showing up in MOJO. I played around with a few programs that were supposed to mount the HDD, but I still didn't see it under storage, and couldn't find it in ES File Manager. If it helps, I have been plugging it into one of the front USB ports. I figured maybe it needs to be in the back, but it works fine in the front with Windows. Is there a mode that works better with MOJO than FAT32?

Edit: The only thing I need it for is to hold my roms for use with my emulators. And maybe some music videos :)