@Brackets, welcome to the forum and thank you for supporting MAKERbuino.
I am sorry for the issues that you’re experiencing.
This sounds like a problem caused by a poor contact between the microcontroller and the SD card socket.
All SD adapters and SD cards are being tested by our team before being sent to the customers.
Please, send us some photos of your device’s front and back side so that we can examine your soldering joints.