Apple SD card reader stopped transferring videos to iPhone

[orbayburak]

Been using Apple SD card reader to transfer pics and vids from Mavic pro to iPhone 6s+. Have been working great till today. It transferred pics but did not transfer 3 short videos. Tried few times and it kept failing with red exclamation point on the video previews. Also tried to transfer a video from past which i was able to transfer about a month ago, that also didn’t work. Any ideas? Maybe Apple update changed the accepted formats? Or size limit? Any help appreciated.

 

[Niblett]

The iPhone won’t do the higher resolution video it seems. If you lower it to 1080 I bet it will work. I know it didn’t work with 4K but it’s fine with 1080.

 

[orbayburak]

never had a problem before, must be a new iphone update that changed it