We are often asked why a brand new device doesn’t have the full capacity available for storage.
The first thing to note is that any device with internal SD memory like a smartphone (and all manner of items such as computers, external hard drives, etc) will always have slightly less space available for the user to access as storage of files than the capacity advertised.
This is because some of the space is used for the Operating System (OS) and the per-installed and native applications. Continuing the example, if you were to analyze a brand new computer with a 320GB hard drive, you would see that some of the space has been already taken up and no matter how much you delete, you can never free that space up unless you were to format all partitions (different sections arranged so to keep areas of different purposes distinct), and then the computer wouldn’t boot as there is no programming left to direct the hardware.
In relation to mobile phones, the more sophistic
ated devices generally have their memory classified as RAM or ROM and noted accordingly on their specifications.
This means that your advertised 16GB will be broken up into distinct partitions, generally one for the essentials and the content that comes on the phone and another that you can store your own content on. In most cases the ROM allocated towards the OS and native apps is about 10-20% of the total capacity, so you might have say only 14 of the 16GB available for your apps, music, photo’s and files. However there are variations in the ways that manufacturers configure this element of a device and income instances they may partition the Internal Memory 50/50 between the OS and the user, so you might only have 8GB for file storage and the other 8GB for the OS and your apps (both per-installed and user-added), etc. Beware that these memory configurations vary per device so there may be a significant difference in the amount of space available for your files in 2 devices of the same memory capacity.
If you find that your current Internal Memory isn’t enough, you can extend this with a mobile memory card, but if you are running out of ROM or RAM you need to lose some apps.
What’s more android system makes the internal memory look even lesser.
Take smartphone of 4 GB internal memory for example, which states only 503 MB + 2 GB in total. You can enter factory mode by press and hold volume down button and power button. Factory mode – item test – eMMC, it states “Total Size (Raw): 3.64 GB”