This, it is by no means expensive for that sweet 512GB of storage:
https://www.amazon.com/PNY-Elite-MicroSD-Card-P-SDUX512U3100PRO-GE/dp/B07KD4XJLX/ref=sr_1_9?fst=as%3Aoff&qid=1565496392&refinements=p_n_feature_two_browse-bin%3A13203835011&rnid=6518301011&s=pc&sr=1-9
Or this for only 36.99 256 GB:
34 years playing games.