Size: 5.0 inches, 68.9 cm 2 (~66.3% Memory: Card slot: microSDXC (dedicated slot) Samsung Galaxy Grand Prime; Samsung Galaxy J3 (2017) More related devices. ADVERTISEMENT. Popular from Check out our support resources for your Galaxy J3 Star SM-J337T to find manuals, specs, features, and FAQs. You can also register your product to gain access to Samsung's world-class customer support. With this video, I will show you, how you can insert a microSD card at the Samsung Galaxy J3 in the version of 2017.Just off the phone and use the Pin (part Expandable Memory. Expandable Memory With 16GB 1 of built-in memory, you can store more than 5,000 photos or 2,500 songs 2 directly on your device. Get up to an additional 128GB of memory with a microSD™ card 3 so you can you can enjoy more of your favorite music, photos and games on the go. 1 Portion of memory occupied by existing content. The 16GB internal memory stores your favorite apps and personal information securely, and a 1.4GHz quad-core processor plays most games and videos without lagging. This Samsung Galaxy J3 Emerge smartphone has a 5-megapixel rear-facing camera and a 2-megapixel front-facing camera for capturing important moments. vLrBuU.