Fantom Drives eXtreme Thunderbolt 3 SSD review: Blazing fast portable storage for iPad & M... There are times when you need the best performance possible. It's usually not cheap, but when it delivers, it can be crucial to your fast-paced workflow. In this case, we're taking a closer look at the Fantom Drives eXtreme Thunderbolt 3 SSD, a drive that works flawlessly on Mac and iPad. Fantom Drives eXtreme Thunderbolt 3 SSD Build and design In terms of design, the Fantom Drives eXtreme SSD has a minimalistic exterior with an all-metal enclosure that appears almost seamless. The opposing sides have ribbed edges which act as simple heat sinks.