Windows 10: before updating win 10 is it required to take back up of data

i want to know before updating to windows 10 is it required to take BACKUP (in external hard disk) of all my dada (images movies etc)??

:)

 

On upgrading to windows 10 , existing saved data will remove automatically or it wont alter the data

Is it require to take back up of data in hard drive before upgrading to windows 10

 

Hi ," Back-up the phone data before updating its software" it mean contacts , photos ... or My OS ?

Sync your phone to Outlook on your computer (to make sure all your contacts, tasks and appointments are stored safely on your computer).

Copy any files you may have on the phone to your SD card or to your computer

Make sure you have the license codes for any software you've installed to your phone handy - you'll have to reinstall the software after the update (if you installed these applications from the Marketplace, you won't have any license codes, so don't worry about
that - the applications will be installed again through your Marketplace account).

Now you are ready to upgrade the OS on the phone.

 

It's not required, but I definitely would!
Specifically I'd make sure I had a full image of the disk and partitions (using Macrium Reflect Free or a similar tool) so that I could revert back in case of problems during the install. But it's also good practice to have backups of your images etc. in any case.

 

Right you are! My Windows 10 installed, but wouldn't run properly. Fortunately, I not only had a full image of my system disk (using Reflect), but also a rescue drive, because I could barely get anything to run (Start menu wouldn't come up at all, and Task Manager froze nearly half the time I managed to get it to run).