The Problem is that this device user is available only 1.26 GB. Everything else is system, pre-installed corporate and partner applications, well, some part of the demo content, which you can remove, but unlikely to greatly expanding the space available. Some Western sources say that thus it is possible to obtain approximately 400 megabytes from the top.
When we first heard about the smartphone Sony Xperia M4 Aqua, many agreed that it is a very successful model. Very enjoyable and interesting, which may be even more interesting than, for example, Xperia Z3+, which was announced at the same time. But now come some of the nuances because of which the device significantly loses points. At least its the version with 8 gigabytes of internal memory.