There could be multiple problems here: SD card is fake, not being detected, bad game dumps, etc.
- Verify your SD card is not fake with .....
- Verify your dumps are legit with .......
- Try also doing this: Connect your sd card to a windows PC and select everything inside.
Right click, properties, advanced, disable "folder/file is ready for archiving". Done.- Format the SD card using Windows
- (Optional) Format the SD card in the Switch