Well, technically you could store anything on it… it a storage device 
Ok, seriously, no –
-the DB data or meta data is stored internally on the tablo. There would be no reference to the recordings.
-The recordings aren’t saved as a single file. -In what format does Tablo save the video/audio stream to the hard drive?- I suppose you could convert it similarly as you the convert process during export. ffmpeg it too complex for me.
There are process explained in various posts to move to a new/bigger drive. Tablo has no official path. You can easily copy after you let tablo format the new drive. Clonezilla LIve is a painless option. There is a backup script a user created - Backup-tablo.sh - Backup all recorded shows from a Tablo presumably backup your old drive… then restore to your new drive.
forum search Search results for 'new drive' - TabloTV Community as a jumping off point.