Apple Watch
My Apple Watch says it can’t update because not enough space but when I go to remove some apps , they don’t move to remove them?
Apple Watch Series 3, watchOS 7
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Community User
Unpair your Apple Watch via the Watch app on your iPhone.
Then Re-pair your Apple Watch,this frees up a surprisingly large amount of storage space.And without any loss of data.
Or;
If you don’t have enough space to update your Apple Watch – Apple Support