I recently decided to use my WD My Passport as a Time Machine. It's an external storage device and I was wondering if it would be adequate for my Macbook Air (2013)? Yesterday I discovered through disc utility that there's a corrupt file on my primary hard drive. Apparently there's no need to format, but I'll have to repair it by using the command-R during boot up? My external hard drive has a storage capacity of 1 TB. Should I dedicate all of it for Time Machine or can I create a partition and let some of it act as an external storage device? That's really why I decided to activate Time Machine seeing as I don't want to risk losing something when I perform the "repair disc utility" through boot up. Also, should I encrypt my Time Machine? What do you think? My Passport = 1TB Hopefully that covers everything you need to know in order to help.