I have an early 2013 Macbook Pro which is running out of disk space on its SSD. As such, I'm looking to purchase an external USB HDD to free up some space.
The MBP is primarily used for Windows development, which is all done in a few Parallels virtual machines. I will be running one or more VMs off the portable HDD, so speed is reasonably important. I know I'm going to be sacrificing some speed when compared to my SSD, but the intent is to keep my primary VMs on that and use the HDD for lesser used VMs. This may even mean swapping VMs from the SSD to the HDD from time to time.
Ideally I'd like a 2TB drive, but would contemplate going down to 1TB if it meant getting a faster model without increasing the budget too much (which currently has a "it seems like a reasonable upper limit" $250 ceiling).
It looks like the Seagate Backup Plus Slim is quite well regarded, as is the Western Digital My Passport Ultra, with the Seagate reported to have slightly better transfer rates.
I see that I can get a Western Digital Elements 2TB portable for $169, which is a pretty keen price. But I've not really seen it pop up in the portable HDD shootouts I've read.
I know I can get a cheaper external drive if I look at the desktop models, but as I contract to a San Francisco based company, I'm looking for a solution that would be better suited to being thrown in my laptop backpack and trekking with me across the Pacific.