Step 1: Save your lot/sim to your library from BUILD MODE. Take note of the time you saved your lot/sim.
Step 2: Go to \Documents\Electronic Arts\The Sims 4\Tray folder then click the date motified to sort all files. Select the files that have the same timestamp. Copy them to a different folder. The copied should have at least one “Trayitem” file, one “Blueprint” file and several “BPI” files.
Step 3: Compress files together by using WinRAR or WinZIP to create the .rar or .zip file.