In general, compression ratio depends on which image size and quality you have selected.
Here is the sample data of image size for a full-size image (2560x1920) in the respective quality mode.
Since the image size may vary depending on scenes and subjects, these are approximate values only.
Economy: 0.73MB, Standard: 1.2MB, Fine: 2.3MB,Super Fine: 14.1MB, no image compression applied
RAW: 9.4MB For the respective storage capacity, please see the instruction manual.