This is the info on the Xperia Z5 Compact's white paper
www-support-downloads.sonymobile.com/e5803/whitepaper_EN_e5803_e5823_xperia_z5_compact_3.pdf.pdf
Memory comprises approximately 10.3 GB of firmware, plus 21.7 GB of “Internal storage” for music, pic-tures and movies, and downloaded applications and their data.
