noun
backup copy
Computing term for a duplicate copy of data kept for recovery purposes.
大事なファイルのバックアップコピーを取っておいてください。
Please make a backup copy of your important files.
Variant with interpunct; less common in running text.
バックアップ is the general term for backup (the process or the data), while バックアップコピー specifically refers to the copy itself.
Loanword from English 'backup copy'.