I have 2 questions regarding time machine backups:
I have a touch bar MacBook Pro 15'' with 256GB SSD (let call it A) and macOS 10.14.3. Currently I perform a Time Machine backup on an external 1TB HD (let call it B). I use Photos with an external 2TB HD (let call it C) in order to maintain the library on an external HD.
1) It is possible, with Time Machine, to backup an external HD into another external HD? I want to backup the Photo library of the HD (C) into an HD (D) (C and D are same size: 2TB) using Time Machine.
2) It is possible to backup A into the external disk B with Time Machine and also, at the same time, backup C into D with the same Time Machine?