9 MB of memory is trivial, unless you have an old machine with an inadequate amount of RAM - in which case you should either get more RAM (not too tough or expensive) or get a new machine (which may, I grant, be more than you want to spend). But unless your machine is bumping up against a RAM or VM space (ie, hard drive space) limitation, that carbonite takes up 9 OMG!
MB shouldn't be a problem.