Unable to update Apple Watch not enough space
How do I free up enough space on Apple Watch to update software. Already removed any apps that can and still only 1.6 fb available
Apple Watch Series 3, watchOS 7
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Unpair your Apple Watch via the Watch app on your iPhone.
Then Re-pair your Apple Watch again,this usually frees up
enough storage space to update your watch.And without any loss of data.
Or this;
If you don’t have enough space to update your Apple Watch – Apple Support