A command line, place is to the root folder where contains all your PRJ folders, save is as backup.bat
download 7-Zip Command Line Version from http://www.7-zip.org/download.html
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7z a mybackup.7z *.* -r -x!*.dll -x!*.exe -x!*.dat -x!*.7z -x!*.xml -x!*.db3 -x!*.msg -ppassword
for RAR use :
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@ECHO OFF
CLS
SET BASEPATH=j:\sourcepath
FOR /D %%i IN (%basepath%\*.*) DO (
RAR.exe a -r "-pyourpassword" -x*\bin -x*\obj -x*.rar -x*.zip -x*.7z -x*.exe -ep1 "U:\upload\%%~ni.rar" -s "%%i"
)
REM %%~ni = folder name only
REM %%i = fullpath
REM enumerate folders - http://ss64.com/nt/for_d.html
REM if u remove /D enumerate files
sample : 
then upload it at https://hubic.com
#backup
origin - http://www.pipiscrew.com/?p=6392 7zip-or-rar-your-project-files-and-folders