Hi Carlos, I have the same model laptop as you. I removed the super drive and replaced it with a hard drive carrier from amazon, plenty of YouTube how to videos on doing it.
I have 128 SSD boot and use the 750 GB it came with for data. I also have 16 GB of RAM I bought from crucial. I think it was around $250 or less for the upgrades and it was well worth doing for the price and especially when compared to selling your existing, buying new, etc.
I don't know how you are using your machine but mine is my daily driver, runs multiple VMs on occasion. Works great.