Website XperiaBlog has found that Sony’s M4 Xperia Aqua (Sony Improves the Look of its Waterproof Devices) is supplied with just 1.2GB of usable storage. The phone has 8GB of storage built in, but the Android OS takes up half of that, with an additional 2GB for Sony’s own apps. Almost 800MB is taken up by other ‘bloatware’, says the site.