With a new E series laptop and Windows 10, two different Acer support people told me I could not file share on my home network with my iMac because "Windows and OSX are different operating systems".
A little googling yielded this:
How to share Mac OS X Yosemite files with Windows 10
http://www.itworld.com/article/2844141/how-to-share-mac-os-x-yosemite-files-with-windows-10.html
The key is to set up sharing on the Mac with Samba. Then you can share folders in both directions. I can mount a folder from the Acer on my Mac desktop and also mount a folder from my Mac on my Acer desktop.
(Samba was developed in 1992. See the wiki for "Samba (Software)" "
...Acer support: are you listening
?
Tony