If you do a search for 2.5" IDE external drive case, you will likely come up with something like this for not much money. (other sources are available
).
Pretty much plug and play, your host PC should automatically assign a drive letter for it, but note that the USB connection lead appears to be a splitter.
It's not, the single end goes into the external caddy, and the double end needs both plugging into two adjacent USB ports on the host computer. Only one carries data, but the other allows for additional power to be drawn, as USB only supports a limited current output to power external devices.
Make sure your Antivirus/spyware is up to date before plugging in your external case, scan the drive before otherwise accessing it, and maybe even work offline initially to be even safer.
Copy your data as required, and then use your new-found external drive as an off-site backup for your data, or as an operating system image for emergencies.
Bill
circlip-Ian, looks like we were typing at the same time, I just picked the next item as they had better feedback 
Edited By peak4 on 21/06/2018 11:35:39