Recovering data

First, i have no backups.
Got new ssd and transfering files to new, (emc folder is on a different drive and own folder on that old drive).
Some files got transfered and restarted moving folder by folder as some files/folder had some errors.
There was some files remaining on emc folder.
Somehow emc got started and created new system with that folder that remain on old drive.
Now there is 2gig dat file on some folder with its buddy files. Tried copieng to new folder etc, doesnt work.
googling is almost all "use backup. "

Easeus recovery cant find full size folder with dat files