How do i convert local owncloud data to S3 file system?

Hi,

I didn't get a solution for this use case. How can i convert my owncloud data which is now running on ubuntu16.04 physical server and to s3 file sysytem. please give us a solution.

This is currently not possible. Local file systems and S3 as primary storage are distinct different. A path from one to another is currently not available. S3 is not a file system but an Object Storage so we are storing all the data like file paths in the database next to the object ID we get from S3.
You can setup a new system and migrate the files themselfs but all metadata including shares would be lost. Can't recommend that path.