If it’s just for game storage, I would just look for a good price on something from a reputable brand (WD, Kingston, Samsung, TeamGroup, even Sandisk or PNY). The OS will be installed on the nvme drive, and loading times for games won’t be terribly impacted by the different speeds offered by SATA drives as there are other limitations in the loading process. After a quick google search, something like this would work great. The only thing you want to avoid are brands with very little info/reviews or drives with a price that is too good to be true (looking at you, $15 drives on Temu).