View source for Game Help:Sims 3 Custom Content in Sims 4

===Package Files=== 

While both Sims 2, Sims 3 and Sims 4 use the .package format, the contents of the files are different, and Sims 4 won't read Sims 3 or Sims 2 files correctly.  They won't work, and worse, the files may actually cause issues with The Sims 4.  Sims 2 and Sims 3 package files mixed in with ones for Sims 4 can really slow down your Sims 4 game - to the point that loading might take ages or things might never load at all.  For more information on this issue, please see: [[Game Help:Package File Lag|Package File Lag]].