Save it on the external hard drive. ✬

Tom copied all the files on his internal hard disk to an external hard disk. ✬

Tom accidentally deleted all the files on one of his external hard disks. ✬

Tom is using an external hard drive. ✬

Tom is using an external hard disk. ✬

Tom backed everything up on an external hard drive. ✬

I have three external hard drives. ✬

Tom's injuries are all external. ✬

Luckily, it's all backed up on my external hard drive. ✬

I bought an external hard drive. ✬