Macworld Looking for a great deal on a new hard drive or SSD to use with your Mac? We are seeing some great deals on storage in the Amazon Prime Day sale (running from July 16 to 17), so there’s no better time to pick up a deal on some new external storage for your Mac. During Amazon Prime Day Prime subscribers can take advantage of savings. To take advantage of the deals you will need Amazon Prime (which costs $14.99/ £8.99/AUD$6.99 a month but can be canceled after 30 days). If you don’t already have a Prime membership, you can sign up for the free 30-day trial and still take advantage of th…