Macworld It’s never been easy to upgrade the storage in Macs, so it’s always a good idea to buy an external drive to provide extra storage for all your work files, photos, videos, and games. And, of course, you should always have an external drive available for making Time Machine backups in case anything ever goes wrong. Modern solid-state drives (SSD) are the best option as they’re really fast, reliable, and compact. However, SSDs are still relatively expensive, with 1TB drives costing around $100/£150, whereas that same amount of money can get you a 4TB basic desktop hard drive with a USB interface (drives with high-speed Thunderbolt ports tend to be more expensive) Hard drives are slower than SSDs, but…