noun
write protection label
Computing term for a physical label used to prevent accidental writing to a storage medium, such as a floppy disk or tape.
フロッピーディスクの書込み保護ラベルを貼って、データを守った。
I put a write protection label on the floppy disk to protect the data.
Compound of 書込み (writing) + 保護 (protection) + ラベル (label).