Moving Files from a Server onto the External Hard Drive of an NVidia Shield TV

I am currently using ES File Explorers Remote Manager to move files from my server to the external Hard Drive of my Nvidia shield. But I am finding that lots of the larger files are failing before they are completed, and I believe this to be caused by accessing the hard drive from within Kodi while the transfer is still happening, and I am hoping for an alternative way.
Is there an add on that I can use within Kodi to gain access?