Why is my Apple Watch Series 3 can’t update with WatchOS 8 ?

Mansbezz wrote:

I think my Internal Memory of my Apple Watch Series 3 since need 1GB to update into WatchOS 8. My Internal Memory of my Apple Watch Series 3 is below from the require 1GB.

That’s pretty much all of Series 3.

See the following blue-text link for details on how to unpair and re-pair to update:

… If you don’t have enough space to update your Apple Watch - Apple Support

If that unpair re-pair does not work, you will want to contact Apple Support.

Okay, then what happens when you try to update the Watch? What are you seeing on the screen? If you see an error, what is the exact text of that error? Is the Watch charged to at least 50% and connected to power? The iPhone should also have at least 50% charge and connected to power as well.

You have an Apple Watch Series 3 that you are trying to update by following the available directions.

The update to watchOS 8 is failing.

Please post the details of the failure.

What are the specific errors or messages or misbehaviors being shown?

There can be various reasons for that failure.

Which means we need you to tell us he details. We can’t see what you are seeing. You will have to tell us.

What version of iPhone do you have and what version of iOS? It requires iOS 15 be installed on the iPhone before you can update to watchOS 8.