Uploading mkv for to my cloud home

In order to get aroud the 5 fb file size limit, I converted a 5.29 mp4 for to a mkv 2.83gb file The file errored out with no reason given.

Another super annoying limitation, people buying 2/4 TB disk and unable to upload 6GB files, Joke!
WD should return money for this product to everybody and apology all IT world for this epic disaster of a product.

When I hit this one, I returned the MY CLOUD DUO to BEST BUY the techs at the store were astounded by my reason and gave me an extra $50 credit to my account for my aggrivation. Unreal. What are you supposed to do with an NAS driven when storage upload to a folder is limited?