Tutorial [Q] Lost directories while backingup (downloads and hsm)

not sure if there is any solution to this -
i was manually backing up all files from the android filesystem
Directories like
HSM - IPhone pictures backup

i successfully manged to backup DCIM / WHATSAPP AND DOWNLOADS .and then for some reason the backup stopped and when i went back to the internal storage the directories DOWNLOADS AND HSM vanished - lost or whatever .
i tried looking through gallery through my files and also via windows - its actually deleted since the files were almost 7 gig in size - its showing i have that much more space in internal storage NOTE 3 sm-n900-

is there anyways i can get these files/directories back ?

thank you any help would be appreciated