also: レガシデバイス
noun
legacy device
Computing term for older hardware or peripherals that are still in use, often requiring compatibility support.
新しいOSでは、レガシーデバイスのドライバが提供されないことがある。
With a new OS, drivers for legacy devices may not be provided.
レガシーデバイスを接続するために、変換アダプタが必要だ。
A conversion adapter is needed to connect a legacy device.
Refers to an entire legacy system (software/hardware), while レガシーデバイス specifically means a legacy hardware device.
Loanword from English 'legacy device'.