Before following the guide you must follow the guides linked below, these guides are from version 2.3.10 if you are using that version or have followed these guides before you can skip them.

SGK V2 – Fixed issue with saving large number of item spawners causing fps drops

SGK V2 – Changes to saving build parts and resources

Go to the BP_SGKSaveGame blueprint and create the following variables:

Name: TempStorageSaveData

Variable Type: S_StorageSave (Set to an Array)

---

Name: TempCookingSaveData

Variable Type: S_CookingSave (Set to an Array)

---

Name: TempCraftingSaveData

Variable Type: S_CraftingSave (Set to an Array)

---

Name: TempVendorSaveData

Variable Type: S_VendorSave (Set to an Array)

---

Name: TempLockSaveData Variable Type: S_LockSave (Set to an Array)

Go to the BP_SaveSystem and copy the video below.

Add the highlighted nodes shown in the image below, location at the top of the image.