Android Questions? Ask Android Device Experts for Answers ASAP
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, proposed preliminary tries (if have not been done) is to format the new SD using the Android device itself > Settings / General / Storage / Format SD card
As Format would delete any and all contents of the card, ensure that the files are still available/stored in the phone itself and/or a backup exists.
Yes please; post back results / observations of the above once tried.