expression, noun
saving changes; overwrite save
Computing term for saving a file by overwriting the existing version, as opposed to 'save as' or creating a new file.
See also: 上書き (うわがき)
編集が終わったら、上書き保存を忘れずに。
When you finish editing, don't forget to save (overwrite).
If you overwrite save, the previous data will be lost.