The USB 3.0 Western Digital My Passport Air is the best looking portable harddisk to complement the design of your MacBook Air/Pro. Two different capacities are available, the 500GB is retailing for SGD$129 and the 1TB is retailing for SGD$219.
The enclosure is made up of anodised aluminium and it measures (length x width x depth) 112mm x 83mm x 11mm and weighs 160g. It is meant to be used with a Mac and hence it comes pre-formatted in HFS+ Journaled.
Personally, I find it a little expensive considering the fact that a similar model from Western Digital, the Western Digital My Passport Slim, is only retailing for SGD$149 for the 1TB and SGD$239 for the 2TB.
In terms of performance, using Blackmagic Disk Speed Test, I managed to get a read and write speed of about 110MB/s which is about 10MB/s slower than it’s nearest competitor, Seagate Backup Plus Slim Portable Drive.