autosave; automatic saving
Computing term for a feature that saves data automatically at intervals or after changes.
This app has an autosave feature.
Thanks to autosave, I didn't lose my data.
保存 is the general term for saving data; 自動保存 specifically refers to automatic saving.
手動保存 means manual saving, the opposite of 自動保存.
Compound of 自動 (automatic) and 保存 (saving). A straightforward modern technical term.