Win 10, Nexus 7 and Calibre

With Win 10 it appears I have to first plug in the Nexus 7, then tell win 10 I wish to view files and folders, then start up Calibre.

Then Calibre sees the Nexus 7 as a device and can copy books etc . Otherwise win 10 seems to block access.

and one small oddity Calibre shows a date of 31 dec 1969 for everything on the Nexus 7.

Cheerio John