copy old files to a new dir

1)  The idea of the script:
We would like to find the files modified some days ago, and mv them to another server.
---- to find the files and directories modified between $3 days ago  and $4 days ago
-----copy to a new server
-----remove those found files from the old server


2) Attentions
   a) to find the files/directories and remove them
       to remove directories
      find . -type d -mtime $i -exec rm -rf {} \; 
      to remove files

      find . -type f -mtime $i -exec rm -f {} \;  

      There must be \ and ;

   b) in csh if we define a variable by:
       set foundfiles = `find . -type d -mtime $i`
       This variable $foundfiles could contain the array.
   c) In csh, it does not work if we define a new variable by :
       set b = $foundfiles 
      will not produce the same string as $foundfiles !!!
    d) The following does not work in csh
       if ( $foundfiles != "") then
          somthing
       endif
     It will produce "if:Expression Syntax" error, because it has difficulty to deal with a variable with array. (see http://www.grymoire.com/Unix/Csh.html also for some insights).
     e ) What works is:
      if ( `find . -type d -mtime $i` != "") then
        something
      endif


3 ) Here is the complete code that I use to copy old files from one server to another.
# Input:
# ---1) the directory where we want to find the folders  in the old server
# ---2) the directory where we want to move the files in the new server
# ---3) the initial date xx when the files are modified xx days ago
# ---4) the final date xx when the files are modified xx days ago
#

set oldserverpath = $1
set newserverpath = $2
set firstdaylimit = $3
set lastdaylimit = $4
#------------------------------------------------
#set newserverpath = /home/user/work/gin/eqna
if ( ! -e $oldserverpath) then
echo "The old directory is not found. Exit."
exit 1
endif
#------------------------------------------------
cd $oldserverpath
# copy folders
@ i = $firstdaylimit
while ( $i  <= $lastdaylimit )
set foundfiles = `find . -type d -mtime $i`
if ( `find . -type d -mtime $i` == "" ) then
echo "Not found files $i days ago. Continue."
else if ( `find . -type d -mtime $i` != "" ) then 
echo "copy the found files $i days ago to gsat"
scp -r $foundfiles "user@gsat:"$newserverpath
find . -type d -mtime $i -exec rm -rf {} \;
endif
@ i += 1
end
# copy files 
@ i = $firstdaylimit
while ( $i  <= $lastdaylimit )
set foundfiles = `find . -type f -mtime $i`
if ( `find . -type f -mtime $i` == "" ) then
echo "Not found files. Continue."
else if ( `find . -type f -mtime $i` != "" ) then 
echo "copy the found files to gsat"
scp  $foundfiles "user@gsat:"$newserverpath
find . -type f -mtime $i -exec rm -f {} \;
endif
@ i += 1
end