The file "[KS] Pierisim_WinterGardem.part01.rar" appears to be the first part of a multi-volume RAR archive containing digital assets, likely associated with , a well-known creator in the The Sims 4 custom content (CC) community. Content Analysis
Move the resulting .package files into your game's Mods folder (usually found at Documents > Electronic Arts > The Sims 4 > Mods ). [KS] Pierisim_WinterGardem.part01.rar
Right-click part01.rar using a tool like WinRAR or 7-Zip and select "Extract Here." It will automatically pull data from the subsequent parts. The file "[KS] Pierisim_WinterGardem