Since there's just the one M.2 slot for an SSD inside the VivoBook 15, you'll have to decide whether or not you want to keep all your data or start fresh with a new Windows 10 install.

Someone has managed to squeeze a full-fat 2280 M.2 SSD inside the new ROG Ally with some clever drilling. Photos of the mod demonstrate that upgrading the Ally to 2280 formfactor SSDs is ...