While I agree with Kees something sounds off with that card, did you try copying this file to your PC's HDD and then importing?
I'm importing 4k video in mov/mp4 on 64gb transcend sd from my Panasonic GH4 using windows photo gallery and i've been able to import a small amount of footage but, majority of the time i'm getting "the following error occurred while importing ###.MP4: The system annot find the path specified." then i'm forced to format when i put the sd back in my camera and i'm also getting "you need to format the disk in drive E: before you can use it" on my pc. I've formatted a couple of times now i'm still getting the error (i've downloaded the codec pack). Really struggling would appreciate any help
asus m5a99x evo r2.0
evga geforce gt740
wd 1tb hdd