How long before a license expires will UnityVSA send the first alert warning?

A company needs to expand their dynamic pool by 5 TB. The current dynamic pool consists of sixty-three 3.8 TB SSD that are configured for RAID5 4+1.
What is the minimum number of drives needed for the pool expansion?

When a manual snapshot of a file system is created, what items are required for its configuration?

When can a LUN be defined as thin or thick?

An administrator initially created a Thin Provisioned file system on Dell EMC Unity. They now want to change that file system (FS) to Thick Provisioned.
What is a consideration?