I would have to agree that getting a Microsoft account and using her free SkyDrive and OneNote synching for items will be best long term (and if she doesn't already use a cloud mail provider, getting an Outlook.com account to do that would make her use of any smartphone, not just a Windows phone, a better experience as well).
It sounds like she's probably just used to doing things one way, which is admittedly a bit archaic in technology terms, but it worked for her and she's probably just a bit lost having totally different options that differ from what she's used to. It will just take some time to figure out what she's got, how to do it better with the advent of the internet
, and making sure she gets comfortable using these services over time.