If you're installing a lot of Steam games, you may run out of space.
It's easy to add a hard drive, and point your Steam settings at the new drive.
Here's an SSD option (get 1tb or 2tb), which will be the easiest to install:
https://www.amazon.com/SanDisk-SSD-PLUS-Internal-SDSSDA-1T00-G26/dp/B07D998212/ref=sr_1_3
You'll also need the cable to plug it into the motherboard:
https://www.amazon.com/BENFEI-Straight-Locking-Compatible-Driver/dp/B07CWQDPG7/ref=sr_1_2_sspa
To plug it in, use one of the cables and plug it into any port on the motherboard that it fits in (if you follow the cable from the drive already installed, you will find another port like it). Then plug the other end into the new SSD. Also, you will need to plug a power cable into the SSD as well.