I would like the possibility to limit the Drive synchronization on any device of the person I share a folder or a document with, based on email accounts:
Person X can synchronize, Person Y cannot, can only access through a browser.

It would also be nice to be able to limit the download of shared directories/files, on account bases.

Another solution / addition would be to systematically encrypt all the synchronized files/folder.

Since I don't know how secure the device of the person is, I believe that the current solutions put data at risk.

Thanks for your nice job!