Dear Samsung Member,
Greetings from Samsung Customer Support!
We apologize for the inconvenience caused to you. Please perform the below mentioned quick steps to resolve the lagging issue:-
1. Ensure 20% of internal memory of device is free (Scroll down notification panel > Setting > Device care> storage).
2. Reset the device: -Kindly create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite.
Tap on Settings>Tap on General Management>Tap on Reset.
For more information kindly click on given link:-
After performing above steps if the issue still persist kindly send us the screenshot, videos and error log file with in 15 minutes of issue occurrence through error report section from Samsung Member Application :- Samsung Member Application > click on get help > send feedback > error report, so that we can help you out to solve the issue.
Thank you for writing to Samsung.
Samsung Customer Support