By Aahil
For some deck owners, the default microSD formatting of Steam decks can cause slow molasses game download speeds.
Update October 24th, 7:10PM ET: Valve does not recommend following these steps to improve microSD download speeds.
While performing a trim operation "the team has found that there are a large number of cards on the market that can be rendered non-functional.
Valve is working with vendors on a fix. But at the moment, you probably shouldn't be following these steps.
If you get a Steam deck, slide in a microSD card, format it, and start installing a game, you might see something.
If your model meets that recommendation but you are still facing slow download speed.
So here is a smart and well documented solution to this problem that worked for me. It can be found within the Steam forums.
Thanks to a user who goes by RoyalMetalKnights. There are several steps involved, but it doesn't take particularly long to do.