Use the following steps to use an SD card as RAM in a Windows computer: Step 1: Insert your SD card into the SD card slot of your computer. Now format the card using the FAT32 file system. Locate your SD card in Windows Explorer and right-click on it to select 'Properties.' Step 2: Navigate to the 'ReadyBoost' tab and select 'Dedicate this device to ReadyBoost.' Finally, click 'Apply' and 'OK' to save the changes.