You can manage the storage space of your Meta Quest headset by going to Storage in Settings.
To check how much storage space is available on your Meta Quest headset:
From here, you can see your headset's storage space, including a breakdown of what sources are taking up space. You can also delete apps and other files to free up space by selecting Delete next to the item you want to delete.
To check how much space is needed to download content from the Meta Horizon Store: