SD card types-help with phone?

Factual Questions
1

I was researching the Motorola Moto X Pure, Third Edition, and I see a couple notes made about the expandable memory. Swappa.com says “128.0 GB max + MicroSD 2.0 compatible”.

The user guide says to use a class 10 memory card. Can someone tell me what the intersection of these two ideas is? What do I search for on eBay?

2

Class 10 is the transfer speed: Speed Class | SD Association

MicroSD is the size.
2.0 presumably is meant to be the SDA spec, which is up to 4.0 now (2.0 came out in 2006):