Thanks for your replies
I follow the "Deployment with continuous build and test automation" article and I delete the (Develop and test) environment then redeployed it as (Build and test) environment.
The Build definition/Build agent are now created into the VSTS.
Now I am trying to connect the local development machine to the VSTS project according to the attached link:
1- We started opening the VSTS from VS then we go to source control explorer to add folders in the VSTS Root and mapped the source of files from Local server to VSTS Project.
2- Then we checked in all the pending changes and found that the changes appeared automatically. After then, we tried to map the created folders (Meta files-Project folder) from Local file to Source control explorer of VSTS .
The mapping action is done successfully and we set check in for the changes made but unfortunately, the contents of the folders created in VSTS are still empty.