Approximately 3GB to 4GB (this includes the OS and the massive PCM sample library). How to Flash the Image to Your Micro-SD Card
Here is a comprehensive guide to understanding, finding, and installing the Korg Krome Inner Storage Image.img file. Why You Need the .img File Korg Krome Inner Storage Image.img File Download
Download a tool like Win32DiskImager (Windows) or BalenaEtcher (Mac/Windows). Approximately 3GB to 4GB (this includes the OS
Insert your Micro-SD card into your computer, select the downloaded .img file in the software, and click "Write." and click "Write."