The most important thing to do is to backup all your data to your Samsung or Google account or to a microSD card if your device has one (if not, you can back up your data to an external USB stick). You can also back up everything to a PC using Samsung's Smart Switch software.
The next step to take is to make sure your device is running the latest software/firmware that is available right now. While these updates don't always need your device to be running the most current firmware, it's a good idea to be ready so you don't have to waste any time when One UI 6.1 arrives and can upgrade as quickly as possible.
Other recommended actions include freeing up some storage space if necessary and updating all your installed apps. You should also keep your phone or tablet sufficiently charged. Installing updates requires Galaxy devices to be charged to at least 20%, but it's better to have a safety buffer and have the device charged to 30% or more.
Bhai koibhi update ap karoge usme Recommendation atahi hai Backup leneka, if you had updated 5.1 then in that also there was a Note of taking Backup to avoid data loss.
