3 Things to Know About the iMac 27-Inch (2020) Storage

The internal SSD is soldered to the logic board You cannot upgrade or replace the built-in SSD after purchase, so choose your storage capacity carefully at checkout.

A SATA bay remains accessible for expansion Apple left a SATA connector and space for a 2.5-inch drive inside, letting you add a second SSD or hard drive.

Adding a drive requires some DIY skill You will need to open the iMac with a screwdriver and basic tools to install the extra storage yourself.