Old hard drive connected to new computer

Mike Sr 2019

TS Rookie
I'm interested in connecting my old hard drive to my new desktop and would like it to be accessible for future use. What inexpensive reliable case is available to buy? I want to stick in a case and keep it under the desk. Both units were/are running Windows 10. Most of the old data was transferred to the new pc - the exception of my 12 years of emails. Thanks.