ASUS T100 Transformer Unable to Access Micro SDXC

I recently bought an ASUS T100 Transformer Book from NCIX that came bundled with a micro SDXC, and am experiencing issues with the tablet detecting and properly recognizing the card. When I first inserted the micro SDXC, the tablet correctly identified it, but now when I insert the card, it appears as "Removable Disk (D, and I cannot access the micro SD's contents! Sometimes it works, sometimes it doesn't, and sometimes it just requires a lot of time to recognize the micro SD. Does anyone have any experience with the issue, or know of a possible fix? Thanks in advance.