iMac 21.5 Late 2013 second hard drive

Hi guys!

I have a late 2013 iMac 21.5 with 1Tb HDD and would like to know if it's possible to install a second hard drive, probably an SSD to run OS and programs, leaving the 1Tb HDD there as well using it mainly for storage.

If it's not recommended, than can you suggest a good SSHD as I don't want to have an external HD and would like to combine speed and storage capacity.

Thanks.