Hello, I would love to assist you further with this concern and apologize for any frustration this has caused. It appears you will want to ensure the tablet settings indicate the SD card is the primary storage source. Yes, we do recommend using an SD card as it is a great way to expand and manage your storage, especially when memory is low and I have attached an article for further review. https://www.samsung.com/us/support/troubleshooting/TSG01001474/
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