Samsung M20 Lagging after the latest android update January 2019

[bhashanaliyanage]

Samsung M20 Worked fine before the new android update. I think this update made my phone laggy. I have free  1GB ram, 12Gb free storage, clean home screen and uninstalled unused apps. I don't know why my phone lags

[dilum]

backup your data and reset the phone or try to free some storage

[bhashanaliyanage]

how much space? I have 12GB free storage

[dilum]

ok.then take a backup and reset your device

[Gowree10]

yes of course
my m20 lags when i using explorer and some apps
i don't what i do???

[dilum]

disable unused apps