Which Oracle datafiles grow in size?

I have downloaded and started up Oracle's pre-built OTN Developer Day VM. The VM is running on an SSD. I want to move datafiles that can grow to a separate mount point (setup as a vmdk on a HDD. more details here ). I am looking at moving the following to the HDD mount point: 1. USERS tablespace 2. Redo log files Should datafiles like temp or undo also be moved if I want to minimize the growth of the VM on the SSD ?