AppendTo[$PersistencePath, "Cloud"]

InitializationValue[$PersistencePath,"FrontEndSession"]={"KernelSession","FrontEndSession","Local","LocalShared","Cloud"}

Initialize[$PersistencePath];
$PersistencePath

InitializationValue[$PersistencePath,"Local"]={"KernelSession","FrontEndSession","Local","LocalShared","Cloud"}

Initialize[$PersistencePath];
$PersistencePath

Quiet[Remove[InitializationValue[$PersistencePath, $PersistencePath]]]