Change the region/configuration/price model of a Workspace

Hi,

I create a workspace in US. Now I want to change its region to Europe. How do to that?

As explained on the following AWS Knowledge Center article, WorkSpaces doesn’t offer an authoritative mechanism to migrate a WorkSpace with user configurations and user data between AWS accounts or Regions. When a WorkSpace is created, its managed resources are bound to its directory service and subnet.

However, it offers a way to redirect users to another existing WorkSpace in a different AWS account or Region.

Also can I change the memory size from 32GB to 16GB?

You can change its compute type to select a new bundle, take a look at the following AWS documentation page.

How to know my workspace is using which model and how to switch between different price models?

I recommend that you read the following AWS Knowledge Center article, which describes how to modify the running mode of WorkSpace.