I was looking for such scripts for long time, but with various results. Finally, I wrote following working scripts, which I am using for files transfer from PC to web server and back via file server and for backup of various folders.

Script for setting permissions for web server without influencing *.sh files (scripts itself):

#! /bin/sh
sudo chmod 660 -R $(ls --ignore='*.sh')
sudo chown www-data:www-data -R $(ls --ignore='*.sh')

just copy this text to file with name for example "Permissions2Server.sh", change the name of user permissions eventually and run from bash.

Script for setting permissions for transfering back to PC without influencing *.sh files (scripts itself):

#! /bin/sh
sudo chmod 777 -R $(ls --ignore='*.sh')
sudo chown user:user -R $(ls --ignore='*.sh')

again, just copy this text to file with appropriate name, for example "Permissions2PC.sh", change user name and run from bash.

And finally, script for backup of the whole folder to compressed file somewhere on the disk:

#!/bin/bash
#Purpose = Backup of folder to the file with name YYYYMMDD-FileName
DATE=$(date +"%Y%m%d")
SRCDIR="/home/foldername01/foldername02"
DESDIR="/home/foldername03/foldername04"
FILENAME=$DATE-filename.tar.gz
# Making backup with compress
tar -cpzf $DESDIR/$FILENAME $SRCDIR

and again, just copy this text to file with name for example "BackUpFolder.sh", change folders names, filename and run from bash.