Can someone help a non gamer? (Ps4)

So i have a ps4 500gb i ran out of space after barely downloading all my games worst part it didnt even get to downloading the games i actually freaking wanted. I did a quick search and found a bunch of stuff talking in circles but eventually saw smth that said buy “ WD 1TB Elements Portable HDD, External Hard Drive, USB 3.0 for PC & Mac, Plug and Play Ready – WDBUZG0010BBK-WESN, Black” off of amazon so i did. I got it plugged it in fresh out the box clicked to use it as my external storage & to have my games download there. Well i downloaded one game then boom the out of storage notification popped right back up i checked the space on the hard drive thing i brought and its FULL OF OPEN AVAILABLE SPACE so wtf is the problem? Can someone help bc i just dont get it and im not good with any of this stuff!

submitted by /u/RealistO444
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