Need a new ssd for my mid 2015 MacBook air

About a year ago my MacBook Air SSD malfunctioned and I need a replacement.

It’s an mid 2015 13” MacBook Air

The old SSD was 128 GB, but I would like to at least double it when I first have to replace it.

The problem in the sea of information I can’t really figure out what specific kind I need for my system, so if anyone would help enlighten me, it would be much obliged!