If your Samsung device is running slow, there are several steps you can take to try and fix the issue:
Restart your device: Sometimes, simply restarting your device can help to clear any temporary glitches or software bugs that may be causing it to slow down.
Clear cache data: Clearing the cache can help free up some memory on your device and may help speed up your device. Go to "Settings" > "Storage" > "Cached data" > "Clear cached data".
Remove unused apps: Having too many apps on your device can slow it down. Remove apps that you don't use anymore by going to "Settings" > "Apps" > "Uninstall".
Update your device software: Check for any available software updates for your device as they may contain performance enhancements and bug fixes.
Disable animations: Turning off animations can help speed up your device. Go to "Settings" > "Developer options" > "Window animation scale", "Transition animation scale", and "Animator duration scale", and set them to "Off".
Factory reset your device: If none of the above steps work, a factory reset may be necessary. This will erase all data on your device, so make sure to back up your important data before proceeding. To factory reset, go to "Settings" > "General management" > "Reset" > "Factory data reset".
If the problem persists, it may be a hardware issue, and you should contact Samsung support for further assistance if you have any question you can leave comment.