Just in time for World Backup Day, Best Buy is now offering the WD easystore 18TB External USB 3.0 Hard Drive for $249.99 shipped. This is $150 off the usual $400 price tag and makes for a pretty enticing chance to start building out a home media server or just a Time Machine backup setup. This is $10 below our previous mention and marks one of the best prices we’ve ever seen – it also means you can grab the drive for $13 per TB. Below the fold, we break down why WD makes our favorite hard drives and detail the rest of the sale from $150.