Why isn't all my storage listed in settings? As seen in the above images, internal storage uses way more then by adding Apps and Cached data to each other. This could be the Android OS, but I think it isn't bequase on the first picture it is deprecated from the other entries. What could be possibly using the unlisted usage and can I reclaim that space (by moving it to my adapted SD)?
If you have large apps, then the total size of the app is not displayed: The extra files which the app needs in order to run itself, do not show up in the description of storage. That means the total size of your apps might be greater than 1.40 GB. This might be one of the possible reasons.