There is supposedly no space on android, although it is, what could be the reason?

Question

Android

Not a single program is installed from google play, the reason is written - there is not enough memory.
Downloads and says not enough space.
Although there are several gigabytes on the phone card, there are also several gigabytes on the flash card.
Even the smallest application is not installed, it says that there is supposedly no space.
Samsung Galaxy S3 has been working fine until now, and suddenly this is the picture.

Answer 1

An application needs three times its size to install and run.

Answer 2

Applications are not always immediately put on the "card".
Get into Settings-Applications, go through the most voluminous ones, click on the button something like "Move to xxx", where xxx, depending on the version of Android, can be "External memory", "SD card", etc.

Answer 3

This is due to the fact that some other data is stored on the internal memory, presumably the cache. Part of the space is apparently reserved for the system, so back-to-back memory cannot be used.
The solution one way or another consists of resetting the cache and possibly cleaning it if you have root rights. All I found comes down to three points:
1. Cleaning the application cache.
2. System
wipe 3. Cache wipe.
The last one worked for me, I don't know why. In any case, CyanogenMod 12, delivered instead of a crooked drain, does not yet complain about this.

Answer 4

Having a root on the device, you can keep it relatively clean. SD Maid Pro helped me, there are many functions, including the search for known garbage and clearing the cache. Most of the space was occupied by thumbnails, thumbnails of pictures - hundreds of Mb! On a friend's phone (which had never been cleaned before), a whole gig was found. Maybe the size of the program is exaggerated, but the removal helped. You just need to make sure that nothing superfluous is deleted, like the VK music cache.
You also need to keep enough free space on the system partition, for which you remove unnecessary systems. Apps and clean the cache of installed (especially Google) Titanium Backup and Application Manager to help.
You can also integrate updates into the system partition with Link2SD so that they do not take up space in 2 partitions, but this is no longer the topic ...
ps still have all sorts of tweaks

Answer 5

There is the concept of "built-in memory". This is not a memory card and not the general memory of the device, it is some kind of special part allocated from the general part. Faced this problem, the solution - I bought a new mobile phone))
Any cleaners do not help. I had a lenovo p780, three years old mobile phone. During this time, applications have grown significantly in volume. I recommend not to suffer and order with Ali some in the region of 8000 rubles.