I Got this laptop from a friend for $20 and was wondering about potential upgrades? I installed Linux Mint and that alone seemed to makes things a little bit quicker. This thing has 256 GB sata ( the smaller/slim harddrive - sorry for the lack of terminology )  8gb ddr4 ram with room for another stick,  intel i5 7th gen cpu

I kind of like this laptop and the back-lit keyboard is a plus..  I'd like to be able to upgrade this thing as much as possible and don't expect or plan on using it for gaming etc. Any info/suggestions are appreciated!