External hard drive to go between Mac and Pc?

I own a MacBook Pro for home use, and an ASUS laptop for work. I'd like to buy a 1tb USB powered portable external hard drive which can not only store files from both computers, but can also be opened on both computers. So, should I do some work at home on my Mac, I can back it up to the drive, take the drive... show more I own a MacBook Pro for home use, and an ASUS laptop for work. I'd like to buy a 1tb USB powered portable external hard drive which can not only store files from both computers, but can also be opened on both computers. So, should I do some work at home on my Mac, I can back it up to the drive, take the drive to work the next day, plug it into the PC laptop and open the same file. Any advice?
Update: http://www.ebay.com.au/itm/Samsung-S2-1TB-USB-3-0-Portable-Hard-Drive-PC-Mac-/380363589934?pt=LH_DefaultDomain_15&hash=item588f6fc92e would this be a smart choice? I'm not sure what format is its default. A guy in a computer shop also mentioned formatting the hard drive to FAT32? Feedback is truly appreciated! show more http://www.ebay.com.au/itm/Samsung-S2-1TB-USB-3-0-Portable-Hard-Drive-PC-Mac-/380363589934?pt=LH_DefaultDomain_15&hash=item588f6fc92e would this be a smart choice? I'm not sure what format is its default. A guy in a computer shop also mentioned formatting the hard drive to FAT32? Feedback is truly appreciated!
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