noun which may take the genitive case particle 'no', noun, noun or participle which takes 'suru', transitive verb
external; externally attached
Used primarily in computing for hardware that is connected externally, such as hard drives, disk drives, or other peripherals. Can also be used as a noun or with する to mean 'to attach externally'.
外付けハードディスクを買いました。
I bought an external hard drive.
Can this drive be attached externally?