copy

import os,time,shutil
counter = 1
filename = "webcam.jpg"
dir_of_testfile = "/home/pi/webcam2/"
destination = "/home/pi/webcam2/backup"
os.chdir(dir_of_testfile)
while True:
  if not os.path.exists(filename):
    continue
  newfile = "%s_%s.jpg" %(filename[:-4] , str(counter).zfill(2) ) #eg test_01.txt,test_02.txt
  shutil.move(filename, os.path.join(destination,newfile) )
  counter += 1 #increment counter
  time.sleep(60) #sleep 1 min