Transparent file encryption in Windows with cloud sync

Question

Data synchronization

There is a question of free transparent folder encryption in Windows with cloud synchronization in popular services (DropBox, MailCloud, etc.).
Ideally, I wanted it to look like this: a home NAS with several shared folders on several computers that are synchronized to the cloud. All files in the cloud must be encrypted. The cloud is a reserve, i.e. it is not planned to use it too often. A little something with NAS (no light, no internet, burned out, etc.) so that you can download data and restore it during the day.
On nix systems there is something similar to EcryptFS.
Those. you need to encrypt data piece by file , and not the whole way. CyberSafe Files Encryption is unfortunately too expensive for personal use. Where to dig?

Answer 1

We will assume that I did not notice the date of the question :)
habrahabr.ru/post/123114