This plugin can only be obtain via the provided script
ONE Save Data Info (menu)
github – https://github.com/jomarcenter-mjm/RPGMakerMVFreePlugins/blob/master/Released Plugins/UIUX Plugins/MJMJS_OneSaveDataInfoMenu.js
gitlab –https://github.com/jomarcenter-mjm/RPGMakerMVFreePlugins/blob/master/Released Plugins/UIUX Plugins/MJMJS_OneSaveDataInfoMenu.js
ONE Save Data Info (Save Screen)
github – https://github.com/jomarcenter-mjm/RPGMakerMVFreePlugins/blob/master/Released Plugins/UIUX Plugins/MJMJS_OneSaveDataSaveWindow.js
GitLab - https://gitlab.com/jomarcenter-MJM/mjmrpgmakermvplugins/blob/master/Released Plugins/UIUX Plugins/MJMJS_OneSaveDataSaveWindow.js