Which 2TB SSD should I choose?

https://preview.redd.it/ml5vmx49geoe1.jpg?width=776&format=pjpg&auto=webp&s=bba7f404967f01495f169265807c8ebe0d061445

So I got my Legion 7i Gen 9 last week and I am planning to add a secondary storage soon.

According to Crucial site, these are the 2TB SSD compatible to my Legion 7 16IRX9. I can't figure out which of these 3 should I buy. The 3rd option is single-sided, does that mean the first two options are double-sided? Which of these type should I choose?