My MacBook Pro has a 2TB drive where my core computing life is. It backs up via Time Machine to a 4TB SSD connected to a Mac mini server and also backs up via Carbon Copy Cloner to a 4TB T9 SSD mounted to the back of my display.
My media library (Plex and iTunes) and archived files are saved to two 8TB SSDs connected to that Mac mini server. These are mirrored to two more 8TB SSDs via CCC.
Lastly, both the MacBook Pro and the two 8TB server drives (not the additional two redundant ones) are backed up via Backblaze.
impressive and expensive. if you were buying the SSD in todays world.