Jason Levine writes: I currently use external hard drives as my backup method. While not as foolproof as automated online backup, it has proved less expensive for me considering that my backups are pushing 1 TB. Around 600GB of that amount are photos or videos. Today, Amazon announced that they are making Cloud Drive storage for photos unlimited for Amazon Prime members. Assuming you kept a local backup as well and that you were already an Amazon Prime member (which I am), would you trust Amazon Cloud Drive to backup 600GB of photos?