When trying to repair a memory stick, I made a mistake and probably deleted boot sector or MFT from my second hard drive. When restarted, disk was not mounted
1/ I recreated boot sector with test disk => disk was there but "access forbidden".
2/ I changed properties of drive : security / advanced ... and added my login as admin with full access on the system
3/ Now I can see all files that were at root of disk, all folders that were at root but that's all => all folders are empty

I know files are still there because the drive space occupied / Free is correct. I still have 400Go occupied.
I've tried some recovery tools but they see deleted files and not what I'm looking for (one software could find many files but without the file tree and sometimes names replaced by code)
note : chkdsk doesn't work, even at restart and MFT repair from testdisk says there's no error
Do you have any idea how I could recover files ?
Thanks in advance
Neko