Hello friends. I am using Nokia 5. Sometimes it stucks on opening apps like share it, MX player, and other apps. I have solved this problem by the steps.
1. Go to settings
2. Open storage
3. Change your sd card from internal to portable storage
4. Move your data from internal to SD card
5. Now make sure that your internal storage doesn't contain videos , photos , apps etc expect app's data and apps cache
6. Make sure that SD card is a portable storage.