Es Explorer giving me errors when copying a file

So I’m trying to copy my build from my firetv to firestick, the process was fairly straightforward, but I keep getting hung up in the middle. I know it works because I copied my pictures over, but when I try to copy my backup file over, about 50% of the way, ES explorer says copy task failed. I tried with google drive and one drive. Dropbox won’t even connect.

so in summary what I’ve done is created my backup file in kodi, saved it to the local drive of the fire tv and then attempted to copy it my cloud so that I can then move the identical build to my new firestick. however, the error occurs at the copying part. Like I said I know it works because simple files like pictures, etc copy over fine. What could be wrong? This seemed like an easy option, but it’s not working. I don’t know what else to do.

I tried adblink on my pc, but it won’t even connect to my fire tv, don’t know why. So now I’m out of options. I’d had to manually build the same build again, I did my own menues, etc, specific addons, just a lot of changes I can’t remember.

Help