diff --git a/conf/php-fpm.conf b/conf/php-fpm.conf
index 7f2c855..a982348 100644
--- a/conf/php-fpm.conf
+++ b/conf/php-fpm.conf
@@ -431,3 +431,4 @@ php_admin_value[post_max_size] = 1G
 
 ; env[IFM_AUTH] = 1
 ; env[IFM_AUTH_SOURCE] = ldap;127.0.0.1:389;ou=users,dc=yunohost,dc=org;(&(|(objectclass=posixAccount))(uid={{username}})(permission=cn=__APP__.main,ou=permission,dc=yunohost,dc=org))
+env[IFM_ROOT_DIR] = /home/yunohost.app/__APP__
diff --git a/manifest.json b/manifest.json
index ff30d8a..5b43a7a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -20,7 +20,7 @@
         "email": ""
     },
     "requirements": {
-        "yunohost": ">= 4.2.4"
+        "yunohost": ">= 4.2.8"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/backup b/scripts/backup
index 75ce3e0..0e4f0f0 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -27,6 +27,7 @@ app=$YNH_APP_INSTANCE_NAME
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
+datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 
 #=================================================
 # DECLARE DATA AND CONF FILES TO BACKUP
@@ -39,6 +40,12 @@ ynh_print_info --message="Declaring files to be backed up..."
 
 ynh_backup --src_path="$final_path"
 
+#=================================================
+# BACKUP THE DATA DIR
+#=================================================
+
+ynh_backup --src_path="$datadir" --is_big
+
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/install b/scripts/install
index d97636f..2da932c 100755
--- a/scripts/install
+++ b/scripts/install
@@ -86,6 +86,20 @@ ynh_script_progression --message="Configuring PHP-FPM..." --weight=2
 ynh_add_fpm_config --package="$extra_php_dependencies"
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 
+#=================================================
+# CREATE DATA DIRECTORY
+#=================================================
+ynh_script_progression --message="Creating a data directory..." --weight=1
+
+datadir=/home/yunohost.app/$app
+ynh_app_setting_set --app=$app --key=datadir --value=$datadir
+
+mkdir -p $datadir
+
+chmod 750 "$datadir"
+chmod -R o-rwx "$datadir"
+chown -R $app:www-data "$datadir"
+
 #=================================================
 # SETUP SSOWAT
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index 4a7848b..cd0fc9e 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -18,6 +18,7 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 
 #=================================================
 # REMOVE APP MAIN DIR
@@ -27,6 +28,17 @@ ynh_script_progression --message="Removing app main directory..." --weight=1
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
 
+#=================================================
+# REMOVE DATA DIR
+#=================================================
+
+# Remove the app data directory with the command `yunohost app remove --purge`
+if [ "${YNH_APP_PURGE:-0}" -eq 1 ]
+then
+  ynh_script_progression --message="Removing $app data directory..." --weight=2
+  ynh_secure_remove --file="$datadir"
+fi
+
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index e0a7127..4d8ef9b 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -28,6 +28,7 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
+datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
@@ -67,6 +68,19 @@ chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
 
+#=================================================
+# RESTORE THE DATA DIRECTORY
+#=================================================
+ynh_script_progression --message="Restoring the data directory..." --weight=1
+
+ynh_restore_file --origin_path="$datadir" --not_mandatory
+
+mkdir -p $datadir
+
+chmod 750 "$datadir"
+chmod -R o-rwx "$datadir"
+chown -R $app:www-data "$datadir"
+
 #=================================================
 # RESTORE THE PHP-FPM CONFIGURATION
 #=================================================