LacrosDataBackwardMigrationMode

This setting decides how much user data is kept after Lacros is disabled. If the policy is set to none or unset, backward data migration is not performed. If the policy is set to keep_none, all user data is removed. This is the safest option. If the policy is set to keep_safe_data, most user data is removed. Only browser independent files are kept (such as Downloads). If the policy is set to keep_all, all user data is kept. This option has a high risk of failure, requiring a powerwash to recover.