What OS are you on? Depending on your device, you have to put your saves in different locations.
ANDROID:
Android/data/com.domain.corruptedkingdoms/saves
PC:
PC > Local Disk (usually C:) > Users > USERNAME > AppData > Roaming > RenPy > CorruptedKingdoms-1547378918
LINUX:
~/. renpy/CorruptedKingdoms/
MAC:
~/Library/RenPy/CorruptedKingdoms/