Possible to backup to 2 different external disk drives ?

Hi,

I have too much data (2,44 TB) to back up to one of my external disk drives.

It's named "H" (2,72TB)...but I have a second one, named "I" (1,87TB), which combined with "H", would be enough for my backup, I think.

So, is it possible to backup my data to both "H" and "I" ?

I tried but if I add "I" to the destination it removes "H"...

Thank you for your reply.

Claude in Montreal