How to get pictures from all sub folders in to 1 single folder?
The following find command will do this for you:

find ./Backup*/ -type f -exec mv {} ./all \;


The ./Backup* says to look in all the directories that start with the word 'Backup'. The -type f says to look for all files; the -exec switch executes the following shell command, which moves the found files (represented by {}) to a directory you should create (in this example, I called it "all"; create this with mkdir all). Note the escaped semicolon at the end of the line -- this is essential to tell the find command that this is the end of the -exec option.