I’m having trouble writing video files (MKV, MP4, etc.) to the external micro SD XC card that I’m using with my SanDisk media drive. The first few files that I write onto the SD card transfer and play fine on the media drive and my PC (I’m using VLC). After about 10GB or so of data has been transferred to the card, the files copy over, but they won’t play. VLC tells me that it does not support the video format “undf”.
I’m using a SanDisk 128GB micro SD XC card spec’ed to 30MB/s (formatted as exFAT)
I have purchased from Flip kart