Best answer: Having 64GB storage in your Surface Go actually equates to just 44GB of usable space following the installation of Windows 10 and associated files. If you plan on storing files locally, this might not be enough space. Luckily, you can add a microSD card to expand storage, and there is a 128GB Surface Go model available from Microsoft.64GB or 128GB storage: Surface Go (From $399 at Microsoft)Affordable storage: Silicon Power 128GB microSD card ($19 at Amazon)