Call of Duty: Modern Warfare 4 is almost ready to leave early access as its October 23, 2026 full release rapidly approaches.

However, as with most AAA Xbox titles these days, it's going to take up a huge chunk of your console's storage space, as its campaign mode alone requires 137GB to install.

While this isn't as extreme as Call of Duty: Modern Warfare (2019)'s 219GB requirement (without Warzone), it's still a massive number that will only get larger once Call of Duty: Modern Warfare 4 adds its multiplayer modes after leaving early access.

So, we've scoured the web for the best Xbox Series X|S storage expansion devices to help you fit Call of Duty: Modern Warfare 4 onto your Xbox Series X|S while leaving more for upcoming Xbox blockbusters like Grand Theft Auto 6.

Also note that when Call of Duty: Modern Warfare 4 launches, you will be able to uninstall what you want to reclaim space. For example, you can uninstall the single-player campaign once you're done with it and still be able to play the game's multiplayer modes.

External hard drives allow you to store Xbox games and other forms of media like music and movies (depending on how you format) and transfer them to other platforms with ease via USB connections.

They can come in a variety of storage sizes (ranging from 512GB, 1TB, 2TB, and 4TB), and they're more readily available compared to Xbox storage expansion cards.

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