diff --git a/scripts/backup b/scripts/backup
index a66a5bc..75e9f52 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -63,17 +63,6 @@ then
     ynh_mysql_dump_db --database="$db_name" > db.sql
 fi
 
-#=================================================
-# BACKUP SPECIFIC FILES
-#=================================================
-
-if [ $with_sftp -eq 1 ]
-then
-    ynh_print_info --message="Backup specific files..."
-
-    ynh_backup "/usr/share/yunohost/hooks/conf_regen/90-ssh_$app"
-fi
-
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/install b/scripts/install
index 03cc8dc..e9e3108 100644
--- a/scripts/install
+++ b/scripts/install
@@ -128,7 +128,7 @@ name: ${db_name}\nuser: ${db_name}\npass: ${db_pwd}" > ../sources/db_access.txt
     cp -r "../sources/db_access.txt" "$final_path/db_access.txt"
 fi
 
-chown -R $app: "$final_path"
+chown -R $app:www-data "$final_path"
 # Home directory of the user needs to be owned by root to allow
 # SFTP connections
 chown root:root "$final_path"
diff --git a/scripts/remove b/scripts/remove
index f39cde3..e9952b0 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -64,15 +64,6 @@ ynh_remove_fpm_config
 #=================================================
 # SPECIFIC REMOVE
 #=================================================
-# REMOVE THE CUSTOM SSH CONFIG
-#=================================================
-
-if [ $with_sftp -eq 1 ]
-then
-    ynh_script_progression --message="Removing the custom SSH config..."
-    ynh_secure_remove --file="/usr/share/yunohost/hooks/conf_regen/90-ssh_$app"
-    yunohost tools regen-conf ssh
-fi
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/restore b/scripts/restore
index 5824cb5..49f60fc 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -90,7 +90,7 @@ ynh_script_progression --message="Restoring the app main directory..."
 ynh_restore_file --origin_path="$final_path"
 
 # Restore permissions on app files
-chown -R $app: "$final_path"
+chown -R $app:www-data "$final_path"
 # Home directory of the user needs to be owned by root to allow
 # SFTP connections
 chown root:root "$final_path"
diff --git a/scripts/upgrade b/scripts/upgrade
index 7ba3989..05cb55a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -147,8 +147,6 @@ ynh_script_progression --message="Making sure dedicated system user exists..." -
 
 if [ $with_sftp -eq 1 ]
 then
-    # Add the password to this user
-    chpasswd <<< "${app}:${password}"
     groups="sftp.app"
 else
     groups=""
@@ -189,7 +187,7 @@ fi
 # SECURE FILES AND DIRECTORIES
 #=================================================
 
-chown -R $app: "$final_path"
+chown -R $app:www-data "$final_path"
 # Home directory of the user needs to be owned by root to allow
 # SFTP connections
 chown root:root "$final_path"