What is a best practice for creating manual snapshots of block storage resources in PowerStore?

During implementation of an iSCSI PowerStore X, the System Administrator is setting up performance policies on externally connected VMFS volumes. They create three DataStores with a high, medium, and low performance policy.
Testing is showing that the VM on the low performance DataStore is running at roughly the same performance as the VM on the high performance DataStore.
Both are performing well, but why is the System administrator seeing the same performance?

Administrator is unable to find a snapshot created a week ago while trying to Restore from Snapshot on one of the file systems.
What could be the reason?

In the context of advanced administration, which of the following tasks are crucial for managing PowerStore systems? Select all that apply.

During the PowerStore migration process, which activities are involved? Select all that apply.