OneDrive offers cloud storage to easily store your computer files on the cloud and your computer at the same time.The files can be 'synced', giving you an online backup of your files.

I like it and use it all the time. I use it to back up work files and it allows me to 'sync' multiple computers.  It works well once it's set up, but it can be a pain to fix when it isn't working. It can be customized a lot so it can be complicated... 

OneDrive gives you 5GB free and 1 terabyte with a 365 dubscription. My brother has a 365 subscription- he can have up to 5 users, so I am one of them...

You can uninstall it if you don't, but I'm guessing it would get noticed and reinstalled as part of you next update... Otherwise, just sign into it (sign up first if necessary) and It shouldn't bother you much anymore...

good luck -jim