Database Info

[Q] Storage Issue

My Z3 has a notification about my phone has 75% of internal storage used and asks me to move some files to my sd card. However, when I checked the storage inside the setting, it showed that I only used for 4-5 GBs while the available space only has 3 GBs. It is really strange since there should be 12 GBs for this phone where is the missing 3 GBs. So, I would like to ask that what make this happen and how to solve it. My first thought of this kind of issue is the problem of system log, but I dont want to root my phone to deal with this.
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[Q] problem in Internal storage

HI every one.
this my first post here
i have this issue in my internal storage.
i got about 430 MB free only from 4.04 GB, the problem is my data are not a lot.
i checked my photo and i found it to much (about 8800), in real its not more than 2000.
please give me a solution?
View attachment 3214809
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Not sure about it but try factory reset.
Before doing it backup ur data

Clear cache and delete file which have "?" Like in the screen shot...but be careful d try to remove battery after 30 sec boot it and clear cache and restart
sent from my GT I9505 5.0.1

Problem about the available storage

Hello,
I have the moto g falcon. The thing is when I go to "storage" in settings, My phone says me that I have only 3.30GB available. But it doesn't correspond with the diagram and the details of the storage.
Because I have a total space of 12.92GB, apps : 519MB, pictures/videos : 1.71GB, audio : 737MB, downloads : 271MB, cached data : 28MB, misc : 1.66GB. The total of this is 4.925GB. So normally I would have an available storage of 12.92 - 4.925 = 7.995GB no ? Or I'm missing something ?
Thanks
PS : I tried a factory reset, but it didn't do anything, same problem
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My mobile is eating internal memory

My mobile is decreasing internal memory... Its Huawei honor 8 lite rooted with elite rom installed. I checked memory with disk usage app. It shows 4 GB memory is occupied by system data. And this system data is not space which is occupied by system rom and files.. It is separate from the system data. I don't know what the hell is system data? And this system data folder is increasing day by day... After a week 1 GB increased and so on... How can I delete it? Anyone help, please
here is screenshot
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A7 4 GB ram see just 16 GB memory

Does any1 have idea why android see just 16 GB of internal memory? I think it's supposed to be 64 GB. After recent soft upgrade my phone worked for some time and one day restart and didn't want to restart, so I erased it, and installed recent XEO soft downloaded from Samsung downloads. Just AP in Odin. Any clues?
Soft info says it's a750fn/ds. It's gold colour. Recovery show its a7y18lte.
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Reinstalled android, from the same file I did before with ODIN and it works fine.