diff --git a/Riot/Managers/URLPreviews/Core Data/URLPreviewStore.swift b/Riot/Managers/URLPreviews/Core Data/URLPreviewStore.swift
index da955da40..ecd152fa2 100644
--- a/Riot/Managers/URLPreviews/Core Data/URLPreviewStore.swift	
+++ b/Riot/Managers/URLPreviews/Core Data/URLPreviewStore.swift	
@@ -61,6 +61,14 @@ class URLPreviewStore {
             if let error = error {
                 MXLog.error("[URLPreviewStore] Core Data container error: \(error.localizedDescription)")
             }
+            
+            if let url = storeDescription.url {
+                do {
+                    try FileManager.default.excludeItemFromBackup(at: url)
+                } catch {
+                    MXLog.error("[URLPreviewStore] Cannot exclude Core Data from backup: \(error.localizedDescription)")
+                }
+            }
         }
     }
     
diff --git a/Riot/Modules/Application/AppCoordinator.swift b/Riot/Modules/Application/AppCoordinator.swift
index d60faf924..03cdc9d6e 100755
--- a/Riot/Modules/Application/AppCoordinator.swift
+++ b/Riot/Modules/Application/AppCoordinator.swift
@@ -16,6 +16,7 @@
 
 import Foundation
 import Intents
+import MatrixSDK
 
 #if DEBUG
 import FLEX
@@ -79,6 +80,7 @@ final class AppCoordinator: NSObject, AppCoordinatorType {
     func start() {
         self.setupLogger()
         self.setupTheme()
+        self.excludeAllItemsFromBackup()
         
         // Setup navigation router store
         _ = NavigationRouterStore.shared
@@ -129,6 +131,17 @@ final class AppCoordinator: NSObject, AppCoordinatorType {
         }
     }
     
+    private func excludeAllItemsFromBackup() {
+        let manager = FileManager.default
+        
+        // Individual files and directories created by the application or SDK are excluded case-by-case,
+        // but sometimes the lifecycle of a file is not directly controlled by the app (e.g. plists for
+        // UserDefaults). For that reason the app will always exclude all top-level directories as well
+        // as individual files.
+        manager.excludeAllUserDirectoriesFromBackup()
+        manager.excludeAllAppGroupDirectoriesFromBackup()
+    }
+    
     private func showAuthentication() {
         // TODO: Implement
     }
diff --git a/Riot/Modules/MatrixKit/Models/Contact/MXKContactManager.m b/Riot/Modules/MatrixKit/Models/Contact/MXKContactManager.m
index 0ccf8096b..3226deef8 100644
--- a/Riot/Modules/MatrixKit/Models/Contact/MXKContactManager.m
+++ b/Riot/Modules/MatrixKit/Models/Contact/MXKContactManager.m
@@ -1873,6 +1873,10 @@ static NSString *contactsBookInfoFile = @"contactsV2";
     if (error == nil)
     {
         [cipher writeToFile:[self dataFilePathForComponent:fileName] atomically:YES];
+        [[NSFileManager defaultManager] excludeItemFromBackupAt:[NSURL fileURLWithPath:fileName] error:&error];
+        if (error) {
+            MXLogDebug(@"[MXKContactManager] Cannot exclude item from backup %@", error.localizedDescription);
+        }
     }
     else
     {
diff --git a/Riot/Modules/MatrixKit/Models/MXKAppSettings.m b/Riot/Modules/MatrixKit/Models/MXKAppSettings.m
index c0984a6da..b31fc0658 100644
--- a/Riot/Modules/MatrixKit/Models/MXKAppSettings.m
+++ b/Riot/Modules/MatrixKit/Models/MXKAppSettings.m
@@ -19,6 +19,7 @@
 #import "MXKAppSettings.h"
 
 #import "MXKTools.h"
+@import MatrixSDK;
 
 
 // get ISO country name
@@ -66,11 +67,10 @@ static NSString *const kMXAppGroupID = @"group.org.matrix";
 {
     NSString *cacheFolder;
 
-    // Check for a potential application group id
-    NSString *applicationGroupIdentifier = [MXSDKOptions sharedInstance].applicationGroupIdentifier;
-    if (applicationGroupIdentifier)
+    // Check for a potential application group container
+    NSURL *sharedContainerURL = [[NSFileManager defaultManager] applicationGroupContainerURL];
+    if (sharedContainerURL)
     {
-        NSURL *sharedContainerURL = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:applicationGroupIdentifier];
         cacheFolder = [sharedContainerURL path];
     }
     else
@@ -86,7 +86,7 @@ static NSString *const kMXAppGroupID = @"group.org.matrix";
     if (cacheFolder && ![[NSFileManager defaultManager] fileExistsAtPath:cacheFolder])
     {
         NSError *error;
-        [[NSFileManager defaultManager] createDirectoryAtPath:cacheFolder withIntermediateDirectories:YES attributes:nil error:&error];
+        [[NSFileManager defaultManager] createDirectoryExcludedFromBackupAtPath:cacheFolder error:&error];
         if (error)
         {
             MXLogDebug(@"[MXKAppSettings] cacheFolder: Error: Cannot create MatrixKit folder at %@. Error: %@", cacheFolder, error);
diff --git a/changelog.d/5498.change b/changelog.d/5498.change
new file mode 100644
index 000000000..091816db7
--- /dev/null
+++ b/changelog.d/5498.change
@@ -0,0 +1 @@
+Exclude all files and directories from iCloud and iTunes backup