Shell Programming and Scripting

function makeBackup ()
{
loc="$1"
if [ "$#" -eq 1 ]
then
case ${1} in
    '*.deb') test -e "$loc"; find "$loc" -type f -iname "*.deb";;
    '*.txt') test -e "$loc"; find "$loc" -type f -iname "*.txt";;
    '*.rar') test -e "$loc"; find "$loc" -type f -iname "*.rar";;
    esac
elif  [ "$#" -lt 1 -o "$#" -gt 1 ]
then
echo "Please enter one location to backup"
fi
}
I know I'm probably going to need a for loop but I'm no good with those anymore. I don't know how to combine case and for in this situation. Or, if you have a better idea that's speedy that'd be awesome. Thanks guys

function makeBackup ()
{
    loc="$1"
    [ $# -ne 1 ] && echo "Please enter one location to backup" && return 1
    [ -d "$loc" ] || echo "Location must be a directory" || return 2
    mkdir -p $loc/Debs $loc/TextFiles $loc/Rar
    find $loc -name "*.deb" -print | xargs -r cp -n -p -t $loc/Debs
    find $loc -name "*.txt" -print | xargs -r cp -n -p -t $loc/TextFiles
    find $loc -name "*.rar" -print | xargs -r cp -n -p -t $loc/Rar
}

function makeBackup ()
{
    loc="$1"
    [ $# -ne 1 ] && echo "Please enter one location to backup" && return 1
    [ -d "$loc" ] || echo "Location must be a directory" || return 2
    mkdir -p $loc/Debs $loc/TextFiles $loc/Rar

    find $loc -type f \( -name "*.deb" -o -name "*.txt" -o -name "*.rar" \) |while read file
    do
         case ${file##*.} in
             'deb') subfolder="Debs" ;;
             'txt') subfolder="TextFiles" ;;
             'rar') subfolder="Rar" ;;
         esac
         cp $file $loc/$subfolder
    done
}

[ -d $loc ]