Getting these 3 issue from last 1 week

[prabhasmishra20]

Please tell us some basic information before asking for help:
Model Name:Asus Zenfone 5z
Firmware Version: Android 9
Rooted or not: not
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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1st issue whenever I update my phone to Android 10 after few hours other file size (sometimes it becomes 51gb) increases without installation of any apps
2nd my phone (5z) restart automatically and power off even when I am not using phone then also

3rd facing network issue not getting network in my device from 3-4 dayss

[victor010]

Hi, we'd request you follow the below steps:
1. Clear system cache.
2. Try the same under safe mode:
Hold the power button for 5 seconds => When the screen flashes with option => Press & hold power option => You will get an option to restart in safe mode
3. If still you face the issue factory reset your phone after taking a full backup.
4. Last option would be to visit the service centre to have
a check. Locate here: https://www.asus.com/in/support/Service-Center/India