c# - OneDrive shared appFolder -

i'm using c# uwp onedrive api , have 2 questions:

1. is exchange (sending , receiving) of files + login via api encrypted?
2. is possible share special folder app root 2 apps? have app a, free , app pro, costs , want make easy user use his/her data app in app pro without him/her having change anything, login onedrive , app fetches necessary data app free version.

all connections onedrive api via https encrypted channels.

the app aspect build around application id use communicate onedrive service, have 2 separate applications on android/ios app stores 1 free , 1 paid use same underlying application id.