I still have a gabillion photos on OneDrive, but fortunately moving from Windows Mobile to Android is easy. You can log into your outlook mail on your V20 and sync your contacts up as well as your Gmail contacts. You don't need to know the 'settings' per se for your Outlook account, just your email and password. If you use this method as opposed to the method posted above, your Outlook and Gmail contacts will still be maintained in their respective clouds, just merged into the contacts app of your phone.
As far as photos and documents, you can install all of the Microsoft apps on your V20, and if you are using OneDrive to store your photos today, you can still select OneDrive for your photos to automatically back up in Android. Very easy to do with minimal effort. All of your Office documents can be opened and edited in the MSOffice apps for Android.