The Xbox One S came with 500 GB, 1 TB or 2 TB of internal storage, and in the age of 100 GB games that is not much, so a full Xbox One S is the normal state rather than a fault. Microsoft's solution is an external drive: the console accepts a USB 3.0 drive, which the repair guides say must be at least 128 GB or 256 GB, plugged into a USB port on the console and formatted for games from the Settings, Storage menu.
If the console does not detect the drive, the guides' first steps are to use a different USB port, to use a cable that is USB 3.0, and to update the console's firmware, since an out-of-date console can reject a newer drive. On a console that is also hot and noisy, a very full internal drive adds to the load, so keep some free space. Moving games between the drives is quick from the Manage game and add-ons screen.
Differential
Likely causes of “Xbox One S storage is full or games will not install”, and how to tell them apart
- 1
A full internal drive
What separates it The console says there is not enough space to install
How to confirm Uninstall games you have finished or move them to an external drive
- 2
No external drive fitted
What separates it Games compete for the internal space
How to confirm Add a USB 3.0 drive of at least 256 GB
- 3
A drive the console will not detect
What separates it The external drive does not appear
How to confirm Try another USB port, use a USB 3.0 cable, and update the console
- 4
Captures, updates and installs queued
What separates it Hidden data takes space
How to confirm Settings, Storage, delete captures and clear queued installs
- 5
A drive that is not formatted for games
What separates it It appears but is not offered for installs
How to confirm Settings, Storage, Format for games and apps
Before you touch a setting
Record this first — changing settings destroys the evidence
- The console's internal size and free space
- The external drive's model, size and USB version
- Whether the drive appears under Storage
- The console's last update
Try in this order
0 of 6 completedOpen Storage
ReversibleSettings, System, Storage shows each drive and what uses the space.
Uninstall what you have finished
ReversibleSelect the game and choose Uninstall; your saves sync to the cloud.
Fit a USB 3.0 drive
ReversibleConnect a drive of at least 256 GB to a USB port on the console.
Format it for games
ReversibleWhen prompted, choose Format storage device for games and apps; this erases the drive.
Move games across
ReversibleManage game and add-ons, select a game and use Move or Copy to the external drive.
Update the console
ReversibleSettings, System, Updates, so newer drives are recognized.
Model-specific
What is true of this model and not of its siblings
- A common size trap
- Many 500 GB consoles have only about 360 GB free after the system, so two or three large games fill them.
- USB 3.0
- Older USB 2.0 drives are too slow and may not be offered for games.
- Moving versus copying
- Moving a game frees internal space at once, while copying leaves two versions and does not help.
- Game updates
- Updates are installed on the same drive as the game, so a game on an external drive needs that drive attached to play.
Stop boundary
When this stops being a self-service repair
- !If a drive that works on a PC is not detected after another port and an update, try a different drive
- !If the internal drive reports errors, contact Xbox Support
- !A console that is full and unresponsive should be restarted and cleared
Evidence ledger
Sources behind this answer
Exact questions
Common questions
How much storage does the Xbox One S have?+
500 GB, 1 TB or 2 TB depending on the model.
What external drive does the Xbox One S need?+
A USB 3.0 drive of at least 128 or 256 GB.
Will formatting erase my drive?+
Yes, so check it first.
Are my saves lost if I uninstall a game?+
Saves sync to the cloud, so they remain.