Re: Lots wont appear in gallery
@Aniyahjonae I am not sure what you are trying to accomplice, perhaps someone else understands better. Do you want to download lots from the Gallery to use in your own save game; or upload your own creations to the Gallery to share with others?
Downloading from in-game, you just need to choose the icon for Place in game, or save to library, from the particular lot screen you are interested in.
From the Gallery website, the lots can be saved to your gallery, and next time you start the game/restart it you will find them in your in-game gallery.
I have only used the Tray folder when I am moving tray files from one The Sims 4 folder to another, by copy/pasting them. Nothing else needs to be done, and the next time I open the The Sims 4 folder with the copy/pasted tray files in its Tray folder; I find the lots in my in-game library, to place in game as I please, or upload to the gallery. The game will only read the folder named The Sims 4; so if you have several like me, renaming the one you want to load next is necessary.
If you are trying to do something different, please explain. 🙂