Oppo A57 is a smartphone in the current market capable of great configuration and performance. The phone comes with huge storage. Although it has big storage, you can also expand your storage using an SD card.
Despite having huge storage, we usually want to increase storage. The Oppo A57 comes with 128 GB of phone storage, enough to hold the files you need. But if you increase its storage, then you will increase your storage. The phone supports a microSDXC slot.