If you’ve ever lost your iPhone or had it stolen, you know that backing up your photos goes a long way toward preventing heartbreak.But choosing a backup method can be confusing. There are cloud storage services such as iCloud, which are easy enough to set and forget but can cause panic when you realize that deleting a photo on your phone removes the same photo from the cloud. You can also back up your photos to your computer, but that requires some extra work.So when we heard some buzz about storage drives that magnetically snap onto the back of your iPhone via Apple’s MagSafe technology and transfer your images and videos for safekeeping, we were curious: Was this the reliable, no-fuss backup method we craved? We decided to test them to find out.