Want to change 5 mock-ups to update the smart object from one file.

[HarryGi]

I have 5 mock-ups all with individual smart objects in each file. All smart objects are the same dimensions.

I want to use the same file in each smart object, without having to go through each file and updating it. Essentially making it possible to update all mock ups through one file.

How can I do this?

[c.pfaffenbichler]

Use a Linked Smart Object.