Time Machine disk questions

[macmesser]

I have a couple of questions regarding Time Machine. First, my time machine disk is full. Can I clone the disk to a larger disk and continue using or will I need to start a new backup? Second, can a shared external drive be used as a Time Machine drive for another Mac?

 

[KALLT]

1. Yes. No.
2. Yes. High Sierra makes this really easy.

 

[macmesser]

1. Yes. No.
2. Yes. High Sierra makes this really easy.

Thanks!