Two things users bemoan about the Samsung Galaxy S6: Its lack of a microSD card slot for storage expansion, and its sealed, non-replaceable battery.

The lack of a microSD card slot on the Galaxy S6 and S6 edge lead Samsung to launch the handsets in a multitude of storage configurations. However, since the higher storage variants were priced at a premium, many customers ultimately went for the LG G4 and other flagship handsets that featured a microSD card slot. Samsung got rid of the microSD slot for its Galaxy S6 and S6 Edge. The reaction to this was pretty on the negative side by fans of the product, but we have a solution which comes in the form of microSD card adapter for Samsung Galaxy S6 and S6 Edge.
Samsung traded the two features in for a thinner and lighter design made from glass and aluminum — which, in our opinion, was worth it. But if you're still stingy about losing the features (and have no interest in picking up the equally impressive LG G4), this case from Incipio may interest you.
See also: 7 battery cases for the iPhone 6 to keep you powered in any situation
Called the offGRID, the case comes with a 3,700 milliamp-hour (mAh) battery that can recharge a Galaxy S6 100% and then some. (A Galaxy S6 has a 2,550 mAh battery). That solves the non-removable battery complaint.
Galaxy S6 Microsd Slot
The case also has a microSD card slot that works with cards up to 128GB in capacity, which solves the storage expansion issue.
Sure, you're adding a little more bulk to your skinny Galaxy S6. But what you gain is a ton more versatility (and protection for your phone).
The case is available for a steep $89.99. There's also a model for the Galaxy S6 Edge.
Another way to add more battery life and 128GB of storage to your Galaxy S6 is with an external battery bank and storage solution, such as Mophie's Spacestation. Those come with way bigger (6,000 mAh) batteries, but they start at $150 for a 32GB, $200 for a 64GB and $300 for a 128GB.

Grab a Samsung Galaxy S6 Fix Kit and bring your phone back to life!
iFixit has you covered with parts, tools, and free repair guides. Repair with confidence! All of our replacement parts are tested to rigorous standards and backed by our industry-leading warranty.
Choose your model of Samsung Galaxy S6 Edge:
Parts that work with Samsung Galaxy S6 Edge:
Device Info
Does Galaxy S6 Edge Have Sd Slot
The Galaxy S6 Edge is Samsung's curved-screen version of the S6. Internally, the Edge is nearly identical to the S6—it has the same octa-core processor, 16 megapixel camera, wireless charging capability, and the whole host of features offered by the S6. Although both devices have the same resolution, the Edge's screen allows for new gestures—configurable for either left- or right-handed persons—and notification systems.