missed folder from my hard disk

I having a missing folder in my Externl Hard Drive Disk (E-HDD) (I didn’t delete it). It’s always in the E-HDD since the disk size didn’t change.
when I used TestDisk (advenced/Undelete option),I find the folder and all the files are within.
My question is: is there a way to show it again (fix the folder state in the file-systeme/table) or to recover it in the same EHD? I can’t recover it in another HDD due to its size (nearly 800 Go)