In the course of changing the containers to RF3, I noticed that unlike the containers with VMs, the Usage metric on Files containers drops by 20% after the change. I.e. normally (a VM container), right after the change the Usage drops by 30% and then gradually returns to the original value. But with Files containers, after the same 30% drop, it returns to a value of 20% less than the original. That was consistent for two Files containers, very different in size and type of stored data. Could anyone please help with an explaination? Thank you.