Large File Transfers (Issues)

Hey

So I just jumped back into DD-WRT with the latest Kong Mod, so far so good but one glaring issue.

I have my share added as a network drive on my Win 10 machine, transfering out files under 5GB seems fine but anything over and keep running into what seems like some kind of timeout. Never had an issue using Netgears stock setup. 

This is an external enclosure with an SSD formatted to EXFAT.

Any advice would be greatly appreciated, would really like to get this working properly.