How to format memory card in Samsung Mobile Device?
Your device lets you use a microSD card to expand memory space.
This secure digital card lets you exchange pictures, music, and data with SD compatible devices.
This article focus on Samsung Galaxy models like Note9, S9/S9+, Note8, S8/S8+ and A8/A8+
A memory card formatted on a computer may not be compatible with the device. Format the memory card on the device.
When formatting an SD card, you should back up your music and photo files that are stored on the card because formatting the SD card deletes all the stored data.