Model M3S: limited space for apps

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2017-02-04 19:58

Hello all,
I have 2 questions for you.

1) I try to install new app to the internal space, but the phone tells me I need more space,
for example 30 MB, but the free space in the phone seems 600 MB or something similar.
I don't understand: the space for apps has a separate space in the internal memory?
It is an issue now, because I cannot install new apps.

2) Using Disk Usage app, I noticed a huge space occupied like in the image.
Do you know which app is related to?
Do you think I can delete it?

Thanks a lot for the answers.

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meizu1.jpg