How to migrate to a bigger drive?

Off load and play on Plex would be a fine solution.  I mostly watch through Plex anyway.

BTW: SAGETV would absolutely do that.  I had four drives in my media machine, sync’d to a NAS in the garage.  When a drive died, I just dropped in a new one, copied over, and done.  And easy to move from one folder to another; just point to it.  I think the fundamental issue here is the odd, proprietary file system that Tablo is using rather than just industry standard.  I suppose there is a good reason for that from your standpoint, but not from that of users.

Thanks @theuser86; I’ll dive into that.