@rakfell Did you save the lot to the online Gallery, or only to your Library? The Library files are only stored locally on your computer, inside Documents > Electronic Arts > The Sims 4 > Tray, so you'd need to manually transfer these files to the new computer. Saving to the Gallery is a separate step.
If you're sure you saved to the Gallery as well, please make sure you've checked the box to view custom content. Even if you didn't use cc in your build, certain other items can trigger the cc flag, and if you've hidden items with cc, you then wouldn't see your own build either.
