New iOS devices are starting to come with a ton of storage. Take the new iPhone Xs and Xs Max. You can get a configuration up to 512GBs! That’s a lot of storage! And who doesn’t like having a ton of space for videos, photos, music, or movies? Well, if you do local iTunes backups (which is what I recommend doing) — you are making regular backups, right? — you may suddenly discover that there is not enough space on your Mac to do backups anymore. This can be maddening! Luckily, with a little bit of work, you can change that default location for your iTunes backups to an external USB hard drive. And I’m going to show you how to do this easily.
First off, I would recommend having a dedicated (or really big) hard drive that you can use for your future iTunes backups. There are a ton of options available, but I would recommend having at least 1TB just to play it safe. A quick search on Amazon for 1TB USB hard drives has quite a number of options for around $50. For a 2TB external USB drive, you are looking at about still less than $100 for that peace of mind.