On next-gen Xbox consoles, you will be able to use external HDDs or SSDs, although not to play most Xbox Series X / S games.
Seagate also took this opportunity to clear up what other storage options Xbox Series X / S owners will have.
Games optimized for the Xbox Series X / S will only be able to run off of drives optimized for the Xbox Velocity Architecture, either the console’s internal SSD or the Storage Expansion Card.
After yesterday’s reveal that the upcoming Xbox Series X / S expandable storage solution would cost a whopping $219.99 at release, there were even more questions about exactly how this high-end memory card would work.