Do you have Windows 10? If so, click on the Microsoft windows icon, and you'll find a list of Most Used - so in my case Mozilla Firefox, Mozilla Thunderbird etc. Then below that is a short list File Explorer, Settings, Power, All Apps. Click on All Apps and scroll down until you get to One Drive. Click on that and follow the instructions - I think that's how I did it. Oh by the way I was asked for an e-mail address and password to sign on. When I upgraded from Windows 8 to Windows 8.1 I was given an e-mail address by Microsoft (which I don't use but it shows up when I turn on my laptop) so I used that (it wouldn't accept my normal e-mail address) then it took me to google mail and I had to sign on to there also. But that could be just because my normal e-mail is g.mail.com and I have it on my 'phone also.
Good luck - if it doesn't work, try googling OneDrive to see how it works.