read/write permission
It's popping from last few days. How to deal with it?

Solution
Thank you, @ADEEL. To begin with, please check if you have the developer options enabled for your device and disable the developer options. Also, make sure that you have enough internal storage left in the device. Then, clear game data (this will clear all game data including all maps and resource files). After that, restart your device and try to open the game again. If this does not help, please check for the available permissions for PUBG MOBILE through your device settings and try to give it the storage permission.
If the issue still persists, you may need to do factory reset of the device settings, as this is the step that helped the other users to resolve this issue.
If the issue still persists, you may need to do factory reset of the device settings, as this is the step that helped the other users to resolve this issue.