The first is a SATA SSD, which comes in a 2.5-inch form factor and connects to your motherboard with the same cables and ports as a SATA HDD. The second (and newer) is the M.2 SSD.

The simplest way to upgrade from a smaller SSD (or HDD) to a larger one is to pull the old drive, install your new drive, and then install your version of Windows from scratch onto the empty drive.

Upgrading the SSD on the ROG Ally is a breeze. Here's how to safely increase storage in your gaming handheld.