my 2013 MBP came with a DVD drive that I hardly use.
Are there any options for me to swap that drive with another peripheral? If so what are my options? I did read somewhere that you could swap the drive for a SSD. Any ideas are welcome
Yes, but it takes some courage. I replaced the DVD of a MacBook Pro 13" from mid-2010. You have to disconnect a really fragile looking drive and speaker connector, and the speaker assembly had to be removed partially.
You can achieve that if you put OS and Apps on the SSD and Data on the HDD if the SSD is in the Optical bay and the HDD in the drive bay, then if you set HDD to spin down to conserve power when possible in the power options that is what happens.
My battery is down to 91% of original capacity, if the HDD is spun down then I can get 8hrs battery life out of it - not because you replaced the optical as that is mostly spun down in any case, but because you allow the HDD to power down.