You made a "Backup" of your documents which involves COPYING your documents from their original location to the new location.
Explain exactly how you performed a backup and maybe we can see what happened.
After performing a back up of my computer on my external hard driver, all the documents has gone. my external was namely Seagate with 500 Gb capacity and now I am connecting it on my computer, it shows the name of Recovery F with only 32 Gb. The hollible thing is that my documents are no longer there.