The files you move around should be the full chain aka all dependent files for the particular chain should be moved to the same extent, if data locality policy is selected. For performance policy, the use case may be different - incrementals can be placed on a different extent, while Fulls are on slower storage tier.
Product Architect @ SingleHop - Veeam Platinum Service Provider
VCAP-DCD, VCAP-DCA, VCP-NV
Veeam Certified Architect