I store visual studio code using my online developer account at https://mycode.visualstudio.com/, using Team Foundation Version Control (not Git).
When it comes to accurate wording for documentation and folder structures, how should I best refer to this repositry?
"TFS", "VSTS", "TFVC", "VSTS-TFVC", etc ?
Which correctly describes the type of source control and the location of the repository I'm using?
You can say:
TFVC repository hosted in VSTS.
VSTS is a cloud platform - a set of services. It can host repositories of two types: Git and TFVC. You can host multiple repositories of each kind in any team project of your VSTS account.
Here is a good article about both source control systems: Choosing the right version control for your project.