Which Portable External Hard Drive

Hi everyone, I've recently made the move to MAC and only bought my rMBP late 2013 a week ago. I'm looking to have my iTunes and perhaps Lightroom Catalog on this. I'd like it to be portable, and was looking at the Samsung http://www.amazon.co.uk/Samsung-Slimline-Portable-Hard-Drive/dp/B008PABFX8/ref=sr_1_1?ie=UTF8&qid=1397485536&sr=8-1&keywords=portable+hard+drive

Can anyone offer suggestions and reviews on this particular hard drive, have you any other recommendations?

Thanks.

Thanks guys. Anyone own the freecom mobile drive mg portable hard drive? I really like the look of this. I own three other freecom hard drives none have let me down in the last 5 years. I'm skeptical of buying this ultra slim hd and I can't find many reviews.