FWIW: my software version is 1.5.51.21130. I have wifi connectivity on the Sony. It just updated the software a few minutes ago.
Here is what I have done so far:
1. created an acct at Box.com. Access it through my desktop browser. Created a directory called SonyDPTS1. Have several pdf files in the directory.
2. On Sony I accessed:
Settings|Server Settings|Network Drive Settings|Server Settings
I get a dialog box and enter the following:
Server:
https://dav.box.com/dav6766
Port: 443
Username: my username
Password: my password
Sync Folder: /Sony DPTS1
Destination Folder: /
I fill in the entries then click on OK. No complaints
3. BTW on the network drive settings page on the Sony
the Download Destination is set to Internal Memory.
Autosync is set to On
4. I go back to the Home page on the Sony. It looks the same as before. No icon to sync or download. Press the parallel lines (I think it is menu) button at bottom of Sony. It displays the time on the top menu bar but nothing else.
The manual says when autosync is on the network drive is synchronized every 90 minutes. Apparently there is nothing I can do to force a sync?? So far none of the files on my Box.com directory have been downloaded.