As others have said, it will be incredibly slow. I had a card with a 45MB/s read speed, and it took over a minute just for Skyrim to get to the opening screen. Then another minute or so to load the save. Your card is 3 times slower than that, so it’ll be rough
If you can, grab something from Amazon or anywhere reputable with a read speed around 80-100MB/s. It’s only around $20 for 64GB.
Walmart even has a Sandisk Ultra 128GB on sale for like $24. It’s 80MB/S transfer speed. Not sure how much longer the sale will last, but that’s a great deal.